Independent Hoshizaki repair

Hoshizaki Repair in Los Angeles

Diagnosis and repair for supported Hoshizaki appliances and equipment in Los Angeles. Same-day service is available.

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Hoshizaki equipment repair technician in Los Angeles
$85 / $120 service callHome appliance / business equipment
Applied to repairIf you approve the estimate
Open 7 days8 AM-6 PM
Serving Los AngelesOn-site diagnosis and repair

Supported equipment

Hoshizaki equipment we repair

Choose the equipment type for problem details and service information. Bastion Service is an independent repair company and is not affiliated with Hoshizaki.

Freezer Ice Machine Refrigerator

Diagnosis first

What a service technician checks

Good diagnosis starts with the exact symptom, model, operating conditions, and service history. The technician tests the systems connected to the failure instead of replacing parts by guesswork.

  • Power, supply, and controls to confirm the machine can start and complete its normal sequence.
  • Airflow, water, heat, and movement as applicable to the exact equipment type.
  • Error history and model data before matching parts, manuals, or service information.

Model reference

Hoshizaki models and manuals

Use the model search to confirm that your equipment is listed. The model and serial label is still the final reference for service information.

Model reference

Hoshizaki equipment model references

496 models
Symptoms and care

Bastion Service repairs Hoshizaki equipment. These model and manual references help identify your equipment; symptoms alone do not confirm a diagnosis.

Manual candidates require the complete model, serial/build and installed controller to be checked. A specification sheet is not an operating manual. These references do not authorize installation or DIY repair.

Repair service only. New equipment installation is not offered.

Equipment repair

Refrigerators: back bar / direct draw refrigerators10

Refrigerators: back bar / refrigerators16

Refrigerators: back bar / slide top bottle coolers8

Refrigerators: chef bases / refrigerators14

Refrigerators: compact undercounters4

Refrigerators: merchandisers display cases / glass door merchandiser refrigerators18

Refrigerators: prep tables / mega tops20

Refrigerators: prep tables / pizza preps13

Refrigerators: prep tables / sandwich preps14

Refrigerators: reach ins / pass thrus8

Refrigerators: reach ins / refrigerators23

Refrigerators: reach ins / roll ins roll thrus4

Refrigerators: undercounters worktops / undercounters45

Refrigerators: undercounters worktops / worktops30

Refrigerators: valiance series / prep tables2

Refrigerators: valiance series / reach ins2

Refrigerators: valiance series / undercounters3

Refrigerators: valiance series / worktops3

Refrigerators: historical HUR40A / HUR68A / HWR40A / HWR68A4

Refrigerators: historical RH1 AAC / RH2 AAC2

Refrigerators: historical RH1 SSB / RH2 SSB / RH3 SSB3

Freezers: historical FH2 AAC / FH2 AAC HD2

Freezers: historical FH2 SSB / FH2 SSB HD2

Freezers: historical HUF68A / HWF68A2

Freezers: historical FH1 AAC1

Freezers: historical FH1 SSB1

Freezers: additional manufacturer listed models71

Ice machines: KM 1340 H modular crescent cubers4

Ice machines: KM 900 H modular crescent cubers4

Ice machines: KM 650 H modular crescent cubers3

Ice machines: KM 600MAH air cooled crescent cuber1

Ice machines: KM 500 H modular crescent cubers3

Ice machines: KM 1800 S H modular crescent cubers6

Ice machines: KM 1601MRH and MRH3: E control edition2

Ice machines: KM 350, 420, 520 and 660 J/Z cubers13

Ice machines: KMS 822MLJ remote ice making system1

Ice machines: KM 901, 1100, 1340 and 1601 J cubers13

Ice machines: crescent cuber series / built in bin6

Ice machines: crescent cuber series / for dispensers8

Ice machines: crescent cuber series / modular21

Ice machines: crescent cuber series / stackable23

Ice machines: cubelet series / built in bin5

Ice machines: cubelet series / for dispensers4

Ice machines: cubelet series / modular19

Ice machines: flaker series / built in bin1

Ice machines: flaker series / modular14

Ice machines: specialty gourmet ice / 1by12

Ice machines: specialty gourmet ice / 2by21

Ice machines: specialty gourmet ice / sphere1

Ice machines: specialty gourmet ice / top hat4

Ice machines: dispensers / ice water dispensers12

Symptoms and maintenance

Equipment symptoms and care by family

Models and manuals

Match the complete model, serial/build and installed controller before using a document.

Bastion Service repairs existing equipment. We do not install new equipment.

Bar refrigerators, bottle coolers and direct-draw equipment4 topics Back to models and manuals

Instruction Manual | Issued: 2019-04 | Revised: 2019-10

Not reaching temperature

Restricted ventilation, crowded storage or a door that does not seal can affect cooling. Fan operation also needs checking. These possibilities do not identify a failed part; diagnosis must separate an operating issue from a repair.

Instruction Manual, page 15 Instruction Manual, page 17

Water beneath the cabinet

Water can be related to drainage, the position of the drain over its pan, or cabinet level. Tell the technician where water appears and whether the equipment was recently moved. Leave internal drain access to service personnel.

Instruction Manual, page 15 Instruction Manual, page 17

Condenser and gasket care

This bar-equipment instruction recommends condenser cleaning every 30-60 days, depending on dust and grease. Gaskets also need regular cleaning. Have the applicable instruction and service edition reconciled before adopting a maintenance schedule for your unit.

Instruction Manual, page 14 Instruction Manual, page 15

Safe maintenance

Maintenance requires disconnecting power. Do not pressure-wash the equipment or remove service panels to follow a general website guide.

Instruction Manual, page 14 Instruction Manual, page 15
HR15A-G refrigerator4 topics Back to models and manuals

Service Manual | Document: MAN-351-R | Issued: 2020-01-30 | Revised: 2023-05-22

Warm cabinet or excessive cooling

A warm cabinet may involve power, airflow, controls or the refrigeration system. Excessive cooling has a separate temperature-sensor diagnostic path. Similar symptoms can require different repairs; testing comes before choosing a replacement part.

Service Manual, page 12 Service Manual, page 13

Condensation and frost

Poor door closure, sensor placement or humid conditions may contribute to condensation. Frost calls for separate fan, control and refrigeration checks. Report whether the moisture is inside or outside and whether the door closes fully.

Service Manual, page 12 Service Manual, page 13

Condenser inspection

This service edition calls for an annual condenser check and cleaning as needed. That does not mean dirt should remain until the next annual visit. Disconnect power before maintenance; internal service belongs to a qualified technician.

Service Manual, page 22

Bring the complete model number

Use the complete HR15A-G model designation when requesting help. An instruction for another HR15A version is not enough to identify the installed controller or interpret its display.

Service Manual, page 13
HR24C refrigerator4 topics Back to models and manuals

Instruction Manual | Document: MAN-328-R | Issued: 2019-03-14 | Revised: 2019-03-22

A temperature warning is not a diagnosis

A high- or low-temperature warning reports a condition, not which part needs replacement. A defrost message can describe normal operation. Record the exact display and identify the installed controller before interpreting it.

Instruction Manual, page 16 Instruction Manual, page 17

Interior and door care

Wipe up spills promptly. Clean the interior, door gasket and shelves regularly using the methods in the HR24C instruction. This keeps routine cleaning separate from troubleshooting an equipment fault.

Instruction Manual, page 18

Condenser inspection

The instruction calls for checking the condenser annually and cleaning as required. A technician can assess access and the condition of the coil; the annual inspection wording is not a guarantee that cleaning is unnecessary between checks.

Instruction Manual, page 18

Electrical and cleaning precautions

Disconnect power before maintenance. Do not spray water directly onto the appliance. A damaged cord or plug needs prompt professional attention, not a do-it-yourself electrical repair.

Instruction Manual, page 18
RM merchandiser refrigerators: 2020 instruction edition4 topics Back to models and manuals

Instruction Manual | Document: MAN-226-R | Issued: 2017-02-22 | Revised: 2020-08-14

A pause after a power interruption

The controller described here delays compressor startup after a power interruption. A brief pause alone does not establish a failed compressor. Tell the technician about the outage and whether cooling resumed.

Instruction Manual, page 16

Control position and model differences

The dial has an off position, and this edition distinguishes RM-45-SD-HC settings from the other listed models. Do not copy settings from a different RM model or assume a dial illustration provides an error-code table.

Instruction Manual, page 15 Instruction Manual, page 16

Monthly condenser cleaning

This instruction specifies monthly condenser cleaning. Arrange appropriate access and cleaning with qualified service personnel. Disconnect power and move stored products to another cooler before maintenance; do not treat this as a universal Hoshizaki schedule.

Instruction Manual, page 17

Returning products after cleaning

Use the manual-approved mild cleaning method for cabinet surfaces and shelves. After maintenance, let the refrigerator cool to its setpoint before returning products.

Instruction Manual, page 17
Steelheart B undercounter, worktop and prep: 2025 instructions4 topics Back to models and manuals

Instruction Manual | Issued: 2025-03-25

Keep the complete cabinet identity

The nameplate is on the inside right cabinet wall. Include its full model and serial information when requesting repair, especially for drawer and low-profile configurations. A grouped specification label does not identify the installed controller.

Instruction Manual, page 1 Instruction Manual, page 11

An indicator is not a failed-part diagnosis

The documented lights include operating states as well as alarms. Report the visible color and behavior without opening service panels. Different control editions use different indications; a light alone does not identify a component to replace.

Instruction Manual, page 40 Instruction Manual, page 43

Condenser attention and safe isolation

Dusty or greasy locations can require more frequent condenser attention. Have qualified personnel establish the appropriate inspection schedule and access. Switching the cabinet off does not disconnect every electrical load; maintenance requires proper power isolation.

Instruction Manual, page 46

Spills, interior surfaces and door seals

Remove spills promptly and clean the interior and gaskets regularly. Choose the surface-compatible method in the instruction and follow cleaner-label directions. Do not spray water into the appliance.

Instruction Manual, page 48
RM merchandiser refrigerators: 2019 instruction edition4 topics Back to models and manuals

Instruction Manual | Document: MAN-226-R | Issued: 2017-02-22 | Revised: 2019-05-23

Cooling does not restart immediately

After a power interruption, the controller described in this edition waits about three minutes before restarting the compressor. That pause by itself is not evidence of compressor failure. Report whether cooling resumes afterward.

Instruction Manual, page 16

Dial position and defrost behavior

An off-position dial stops the compressor and fans even when the cabinet is warm. Automatic defrost also changes normal operation. Match the instruction edition before interpreting a pause or changing controls; later RM instructions describe different defrost timing.

Instruction Manual, page 15 Instruction Manual, page 16

Condenser cleaning for this edition

The 2019 instruction calls for monthly condenser cleaning. Arrange qualified access rather than removing service panels to follow a web guide. Disconnect power and move products to another cooler before maintenance.

Instruction Manual, page 17

Reloading after cabinet cleaning

Use a mild soap solution for cabinet surfaces and shelves, avoid strong detergents, and dry the interior. Let the refrigerator return to its setpoint before loading products again.

Instruction Manual, page 17
RM merchandisers: 2024 service control context3 topics Back to models and manuals

Service Manual | Document: MAN-243-R | Issued: 2018-12-17 | Revised: 2024-05-07

Two control systems, separate interpretations

This service edition describes Sollatek CT-198-SOL and Coel CT-198-CO controls. They do not share one indicator legend. Include a photo of the accessible control face with the model information; identifying the fitted control belongs in the service assessment.

Service Manual, page 16

Lights can describe normal operation

Coel indications distinguish operation, standby, defrost and alarms. The separate Sollatek table includes voltage and delay conditions. Record the actual light pattern and when cooling changed; do not treat every illuminated light as a fault.

Service Manual, page 16

Reconcile the maintenance editions

This service edition specifies a yearly condenser check and cleaning as needed, while the RM owner instructions specify monthly cleaning. Have the applicable documents reconciled for the unit; the service inspection interval is not permission to postpone needed cleaning.

Service Manual, page 27
Steelheart side-mount refrigerators3 topics Back to models and manuals

Instruction Manual | Issued: 2024-01-19 | Revised: 2025-05-13

Service Manual | Document: 73255 | Issued: 2025-09-08 | Revised: 2026-06-26

A flashing indicator is not a failed part

Compressor and fan indicators can flash during operating delays. Refrigerator and freezer timing differs in this instruction. Record which indicator is flashing rather than treating any flashing light as a compressor or fan failure.

Instruction Manual, page 35

Does a warm side-mount cabinet mean the compressor has failed?

Not necessarily. Power, controls, a dirty condenser, fan operation, evaporator icing or refrigerant conditions can affect cooling. Report whether the cabinet is warm, whether ice is visible and what the display shows, without removing panels. These observations help frame the diagnosis; they do not identify a failed part. The shared manual also lists freezer-only defrost components, which must not be treated as refrigerator faults.

Service Manual, page 31

Match filter and condenser care to the unit

The air filter and condenser need separate attention. Dust and sanitation requirements affect care, and access differs from a refrigerated equipment stand. Confirm the maintenance schedule for the installed unit before turning the manual table into calendar reminders.

Instruction Manual, page 41
Steelheart refrigerated equipment stands3 topics Back to models and manuals

Instruction Manual | Issued: 2025-08-01

What must be ready before the refrigerated stand is serviced?

Tell the technician what cooking equipment sits on the stand so safe access can be planned. Before maintenance, move food to another clean refrigerator. The stand must be unplugged, and the cooking equipment above must be disconnected and allowed to cool. Turning the stand off alone leaves some electrical loads energized. Leave panel removal and internal work to qualified service personnel.

Instruction Manual, page 28

Filters and condenser access

This stand uses a different filter handle and front-panel arrangement from side-mount cabinets. Use the stand instructions when arranging filter and condenser care. The maintenance table needs clarification before its frequency labels become a fixed service schedule.

Instruction Manual, page 28

Use the stand model when describing a display

The indicator legend contains refrigerator and freezer wording, although this instruction covers refrigerated stands. A freezer reference in the legend does not establish the operating behavior of your stand. Provide its complete model designation with any display photo.

Instruction Manual, page 21
Steelheart PR67B-Z prep tables7 topics Back to models and manuals

Service Manual | Document: 73277 | Issued: 2026-06-25

Instruction Manual | Issued: 2026-04-22 | Revised: 2026-05-18

Is the upper rail warm, the cabinet warm, or both?

Describe the upper ingredient rail and lower storage cabinet separately. This PR67B-Z service edition distinguishes the rail/refrigeration control from the cabinet fan control. Note which display has changed, what it shows, and whether its icon is steady or flashing. The rail display includes compressor, defrost and alarm indications; an alarm identifies a condition, not a failed part. Do not use a rail indication to diagnose the cabinet fan or change control wiring to investigate. Give the technician the compartment, display and full model information.

Service Manual, page 35 Service Manual, page 36

Does a flashing fan icon mean the fan has failed?

Not by itself. The PR67B-Z instruction describes a flashing fan icon while a delay is active and a steady icon when the fan is energized. The paired service table lists the steady state but omits that flashing description. An omitted state is not proof of a fault. Record the icon, whether it changes, and any cooling complaint. Have the installed control and manual edition matched before interpreting the display or replacing a component.

Instruction Manual, page 34

When does the condensate drain need service?

This instruction calls for drain-hose cleaning when needed to maintain flow, not a universal monthly visit. Report new pooling or changes in drainage, including where and when they appear; those observations do not prove a blocked hose. The manual procedure requires panel and hose removal. Leave that access to service personnel rather than opening the appliance to clear it. A drainage check is separate from confirming the cause of a cooling problem.

Instruction Manual, page 45

Why is one compartment not cooling?

A warm ingredient rail may involve airflow, pan or divider placement, controls, sensors or the refrigeration system. Lower-cabinet cooling also depends on door seals, the cabinet fan and its controls. Report which compartment is affected. These possibilities call for different checks; they do not establish that the compressor needs replacement.

Service Manual, page 32 Service Manual, page 33

What can cause icing or a defrost problem?

Icing may involve airflow, door sealing, controls, defrost components or refrigeration conditions. A defrost cycle that does not start has a different diagnostic path from one that does not end. Leave internal inspection, electrical testing and refrigerant work to a qualified technician.

Service Manual, page 33

What should I report about Hi, Lo or an E code?

Hi and Lo indicate high or low temperature in the relevant control context, not a confirmed failed part. Photograph the display and identify the compartment. Keep any minus sign in an E code. The rail sensor descriptions conflict in these manuals, so a sensor assignment needs clarification. An alarm threshold is not a food-safety limit.

Instruction Manual, page 39 Instruction Manual, page 40

What can kitchen staff check without opening the unit?

Check whether doors close and stored items obstruct airflow. Use pre-chilled ingredients and the specified pan arrangement. Before cleaning, relocate food and disconnect power as instructed. Leave service panels closed; electrical and refrigeration work requires qualified service. Bastion Service repairs existing equipment; we do not install new equipment.

Instruction Manual, page 42 Instruction Manual, page 43 Instruction Manual, page 44
Steelheart B-Series raised-rail prep tables3 topics Back to models and manuals

Service Manual | Document: 73246 | Issued: 2023-02-14 | Revised: 2026-06-16

Why can the ingredient rail stay warm with its lids open?

Report lid position and whether the lower cabinet is also warm. The rail light-sensor system can remain in night mode with the lids open. Settings, airflow, pan or divider gaps, sensors and refrigeration conditions are other possible causes. Do not bypass the light sensor or assume a cooling complaint proves compressor failure.

Service Manual, page 43

What does the cabinet cooling icon tell us?

For the controls listed in this edition, the icon concerns cabinet fan operation; fan energizing depends on compressor operation. The applicable control description depends on model and serial. It is not proof that food is at a safe temperature. Send a display photo and the complete model, serial and auxiliary codes. Aux Code Q-7 identifies an equipment change, not a fault code.

Service Manual, page 47

Which maintenance items need separate attention?

Filters, the condenser and power connections have separate inspection needs. Conditions can require more frequent care. A damaged cord or plug needs prompt qualified repair. Maintenance requires disconnecting power; leave internal service to qualified personnel. Confirm the applicable instruction and schedule before setting reminders, rather than borrowing the PR67B-Z schedule.

Service Manual, page 66
Steelheart upright refrigerators3 topics Back to models and manuals

Instruction Manual | Issued: 2025-03-19 | Revised: 2026-06-09

Instruction Manual | Issued: 2025-03-19

Service Manual | Document: 73237 | Issued: 2019-02-25 | Revised: 2026-07-14

Why can the cabinet be warm even with power on?

Door-switch operation, airflow, a dirty condenser, controls or refrigeration conditions may affect cooling. Report whether the whole cabinet or one compartment seems affected, and photograph any warning. A protection trip has several possible causes; it does not identify a failed pressure switch or compressor. Leave electrical and refrigerant checks to a technician.

Service Manual, page 39

Does a stopped fan while loading mean a motor failure?

This instruction describes the evaporator fan switching off with an open door, with an explicit DT1A exception. A stopped fan during loading does not by itself establish a motor fault. Report the complete model, door position, display and any cooling complaint. The DT1A exception must be checked before applying the general door-response explanation.

Instruction Manual, page 35

Do the filter, condenser and condensate wick need the same care?

No. The service edition separates these tasks, and a condenser may need cleaning between planned inspections. Its wick procedure excludes DT1A-HS and the freezer compartment of DT2A-FS. Confirm the applicable instruction and unit-specific schedule before setting reminders. Relocate food and disconnect power before maintenance; internal access belongs to qualified service personnel.

Service Manual, page 56
Valiance reach-in refrigerators3 topics Back to models and manuals

Instruction Manual | Issued: 2025-05-02

Service Manual | Document: MAN-403-R-01 | Issued: 2025-03-19

Is the reach-in too warm, too cold, wet or frosted?

Describe these separately, along with any lighting concern and the affected compartment. Excessive cooling points to a temperature-sensor check; condensation can involve door closure, sensor placement or humidity. A warm cabinet and evaporator icing have different diagnostic branches involving airflow, controls or refrigeration. None confirms a failed part. Refrigerator and freezer sequences differ; leave internal inspection and live electrical measurements to a technician.

Service Manual, page 13 Service Manual, page 14 Service Manual, page 19

Not every display message is an error

Startup, keyboard, door, defrost and operating-mode messages are listed separately from faults. Some defrost messages depend on controller settings. Describe when the message appears and whether cooling is affected instead of treating every unfamiliar display as a broken component.

Instruction Manual, page 22

Inspection is not a once-a-year cleaning limit

This service edition specifies annual condenser inspection and cleaning as needed. Operating conditions can require cleaning between inspections. Power isolation and protection of stored food come before maintenance.

Service Manual, page 27
Valiance VSR prep tables3 topics Back to models and manuals

Instruction Manual | Issued: 2025-03-14 | Revised: 2026-07-10

Do not reset defrost from a generic guide

The reviewed defrost instructions contain a detail that needs manufacturer clarification. Do not change termination settings or apply a generic code chart from a dial illustration. Have the exact instruction and installed control checked first.

Instruction Manual, page 26 Instruction Manual, page 29

Resolve the cleaning schedule before setting reminders

Cleaning prose and inspection-table labels use different maintenance wording in this instruction. They should not be collapsed into one assumed interval. The operating environment also matters; arrange an equipment-specific schedule after the wording is reconciled.

Instruction Manual, page 27

What should you report when the prep table is not cooling?

Give the full VSR model and describe the cooling problem, any visible frost, moisture or loss of lighting. A warm cabinet may involve power, the door switch, fans, the condenser, controls or refrigeration. Condensation has separate door, sensor and humidity checks; excessive cooling has a temperature-sensor check. These are possible causes, not failure-frequency rankings. Leave internal testing to a technician before choosing parts.

Instruction Manual, page 28 Instruction Manual, page 29
Valiance undercounter and worktop refrigerators3 topics Back to models and manuals

Instruction Manual | Issued: 2025-09-30 | Revised: 2026-05-14

Refrigerator and freezer defrost timing is different

The operating section separates refrigerator sizes and freezers, while a later troubleshooting entry uses a more general timing label. Do not transfer one timing value to every unit. The model, control and applicable instructions need to be reconciled.

Instruction Manual, page 25 Instruction Manual, page 29

Cleaning and inspection wording needs reconciliation

This instruction gives condenser-cleaning guidance separately from its inspection table. Frequency wording differs between them, and environmental conditions can require more attention. Keep those contexts separate when a technician prepares the maintenance plan.

Instruction Manual, page 26 Instruction Manual, page 27

Does moisture around the cabinet mean a refrigeration leak?

Moisture alone does not establish a refrigerant leak. Condensation checks include door closure, sensor placement and humidity; cooling and frost complaints need separate airflow, control and refrigeration checks. Report where moisture appears, whether the cabinet is too warm or too cold, any lighting problem and the full model. The shared refrigerator/freezer table does not establish the cause in your unit. Leave internal access to service personnel.

Instruction Manual, page 28 Instruction Manual, page 29
FH2-AAC / FH2-AAC-HD: operating and care guidance3 topics Back to models and manuals

Service manual 73096 (revised 2007-03-07); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73096 | Revised: 2007-03-07

Service bulletin SB03-0007R3 (revised 2007-12-19); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: SB03-0007R3 | Revised: 2007-12-19

Defrost messages are not automatically faults

On the SafeTemp controller described in the matched manual, dEF indicates defrost and rEC indicates recovery. If cooling does not recover, tell the technician what the display shows and when the change started. Do not change service-menu settings to force the message away.

Service manual 73096 (revised 2007-03-07), page 14

A warm cabinet needs diagnosis

Possible causes include door-sealing problems, restricted airflow, dirty cooling components, a fan problem, or a defrost fault. Refrigerant and sensor problems are other possibilities. Persistent ice buildup does not, by itself, identify a failed heater. Internal testing belongs with a technician.

Service manual 73096 (revised 2007-03-07), page 19

Filter care and condenser care are different

This SafeTemp edition calls for checking the air filter at least monthly and the condenser annually, with cleaning according to condition. These are different components. Match the maintenance plan to the actual unit and operating environment; have a technician handle work requiring internal access.

Service manual 73096 (revised 2007-03-07), page 32
FH2-SSB / FH2-SSB-HD: operating and care guidance2 topics Back to models and manuals

Service manual 73077 (revised 2012-05-22); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73077 | Revised: 2012-05-22

Read the signal without guessing the failed part

In this TempGuard guide, E1/E2 concern high/low temperature; E3 defrost; E4 high pressure; E6/E7 high/low voltage; E8/E9 cabinet/defrost sensor circuits. CF is a condenser-filter alert and door is a door-open indication. Record persistent signals for a technician. These are not parts diagnoses. Do not bypass switches or clear internal alarms to keep running. The E1 trigger depends on board revision, not just the FH2 model.

Service manual 73077 (revised 2012-05-22), page 31 Service manual 73077 (revised 2012-05-22), page 32

Maintenance and equipment identification

The matched SSB guide calls for annual condenser inspection and cleaning as needed. Provide the complete model and available data-plate information when requesting service. An older cabinet may have a replacement controller.

Service manual 73077 (revised 2012-05-22), page 65
HUR40A / HUR68A / HWR40A / HWR68A / HUF68A / HWF68A: operating and care guidance6 topics Back to models and manuals

Instruction manual (revised 2005-07-08); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Issued: 2003-06-24 | Revised: 2005-07-08

Service manual 73123 (revised 2008-09-30); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73123 | Issued: 2005-02-04 | Revised: 2008-09-30

A temperature warning

E1 means unusually warm cabinet conditions; E2 means unusually cold conditions. Record the code and temperature. A persistent warning needs diagnosis, not an assumed refrigerant recharge.

Instruction manual (revised 2005-07-08), page 17

dF versus E3

dF identifies defrost. E3 reports an overlong defrost and may alternate with dF. Report E3 for service; do not treat it as an ordinary defrost display.

Instruction manual (revised 2005-07-08), page 14 Instruction manual (revised 2005-07-08), page 17

Cooling or filter trouble

Check for blocked interior airflow and packages preventing closure. E4 or E7 warrants attention to heat rejection, but neither proves that cleaning alone will repair the unit.

Instruction manual (revised 2005-07-08), page 17 Instruction manual (revised 2005-07-08), page 18

Plan routine care

Arrange regular gasket and filter care, plus annual condenser inspection. Filter-frequency wording conflicts between sections; confirm the schedule with the technician. Power must be isolated before cleaning.

Instruction manual (revised 2005-07-08), page 19 Instruction manual (revised 2005-07-08), page 20

Keep the auxiliary code

Provide the complete model, serial number and auxiliary code. Some earlier names map to these models only with auxiliary code N-6 and a serial ending H. Replacement-board compatibility also needs verification.

Service manual 73123 (revised 2008-09-30), page 5 Service manual 73123 (revised 2008-09-30), page 54

Sensor or controller messages

E8/E9 point to sensor monitoring; EA/ED point to controller memory. Record the exact message for a technician. The displayed highest-priority alarm does not rule out other concurrent faults.

Service manual 73123 (revised 2008-09-30), page 33 Service manual 73123 (revised 2008-09-30), page 34
RH1-AAC / RH2-AAC: operating and care guidance1 topic Back to models and manuals

Service manual 73096 (revised 2007-03-07); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73096 | Revised: 2007-03-07

Refrigerator defrost is different

These AAC refrigerators use automatic off-cycle defrost. The freezer's heated-defrost and recovery descriptions are not refrigerator instructions. Do not copy freezer settings to a refrigerator.

Service manual 73096 (revised 2007-03-07), page 14
RH1-AAC / RH2-AAC / FH1-AAC: operating and care guidance2 topics Back to models and manuals

Service manual 73096 (revised 2007-03-07); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73096 | Revised: 2007-03-07

HI and LO in the menu

HI and LO identify setpoint limits in this AAC service menu, not standalone fault diagnoses. Photograph the display and controls rather than changing hidden settings.

Service manual 73096 (revised 2007-03-07), page 14

Keep filter checks on the schedule

Plan at least monthly AAC filter inspection and annual condenser inspection, with cleaning when needed. Dirty airflow components may need attention sooner; these are separate checks.

Service manual 73096 (revised 2007-03-07), page 32
RH1-SSB / RH2-SSB / RH3-SSB / FH1-SSB: operating and care guidance2 topics Back to models and manuals

Service manual 73077 (revised 2012-05-22); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: 73077 | Revised: 2012-05-22

E7 is not CF

For these SSB controls, E7 concerns low supply voltage; CF concerns the condenser filter. Record the exact message. Filter cleaning is not a repair for an electrical-supply warning.

Service manual 73077 (revised 2012-05-22), page 31 Service manual 73077 (revised 2012-05-22), page 32

Report a persistent E1

E1 warns of prolonged high cabinet temperature. Refrigerator and freezer rules differ, and freezer behavior depends on board revision. Report the model and fitted controller instead of relying on a generic code list.

Service manual 73077 (revised 2012-05-22), page 31
FH1-AAC / FH1-SSB: operating and care guidance1 topic Back to models and manuals

Service bulletin SB03-0007R3 (revised 2007-12-19); original control context only. Match auxiliary code and installed/replacement controller; no automatic serial routing. | Document: SB03-0007R3 | Revised: 2007-12-19

Earlier FH1 units and replacement controls

An earlier FH1 may have been converted during service. Its serial number alone cannot settle replacement-controller settings. Give the technician any repair history; internal inspection and programming are technician work.

Service bulletin SB03-0007R3 (revised 2007-12-19), page 1
KM-1340 H modular crescent cubers7 topics Back to models and manuals

Official service manual; model, serial/build and installed E/G controls must match. MRH3 historical board-part assignment remains unresolved. | Document: 73196 | Issued: 2013-04-29 | Revised: 2016-09-21

No ice even though the bin is empty

An empty bin does not rule out a bin-control problem on these KM-1340 models. The manual describes thermostatic control that can stop the machine in unusually cold surroundings. Water-supply restrictions, a clogged external filter or a protection alarm can also interrupt production. Tell the technician whether the stoppage followed cold weather, a water interruption or control work. Do not bypass the bin control or open the electrical compartment; the control switch alone does not isolate every electrical load.

Official service manual, page 17 Official service manual, page 31 Official service manual, page 37 Official service manual, page 43

A single sound or a repeating alarm?

Record the number of beeps in each repeating group and when they occur. In this manual, the G board makes a single sound when switched to ICE, while the E-board description notes a sound at power-off. Those events differ from repeating protection alarms. Repeating one-beep groups point to high evaporator temperature, which can have several causes. Give the technician the full model number and any prior board-repair record; do not identify the installed board from sound alone or repeatedly reset an alarm.

Official service manual, page 44 Official service manual, page 45

Two beeps and ice that is slow to release

A repeating two-beep group means harvest ran beyond the manual's limit on two consecutive cycles. Ice that is slow to release can involve scale, restricted water delivery, temperature sensing, valve operation or refrigeration performance. On the water-cooled MWH variant, the technician also has a different condenser-water system to consider. Describe whether ice releases late or remains attached. The sound alone does not identify a replacement part; leave internal testing and ice removal to qualified service.

Official service manual, page 38 Official service manual, page 39 Official service manual, page 44 Official service manual, page 45

Three beeps or increasingly slow ice production

Repeating three-beep groups indicate that two freeze cycles reached the configured time limit. This edition lists different default limits for KM-1340MWH and the other KM-1340 H variants, so another model's timing is not a reliable comparison. Scale, water-level sensing, leaking valves, weak circulation or refrigeration trouble may extend the cycle. Report changes in output and recent cleaning or filter work. Do not lengthen a timer to mask the problem; the technician must match the installed controls to the exact model.

Official service manual, page 39 Official service manual, page 40 Official service manual, page 44 Official service manual, page 45 Official service manual, page 46 Official service manual, page 49

Six or seven beeps need electrical diagnosis

In the reviewed E and G control descriptions, repeating six- or seven-beep groups indicate low or high control voltage. They do not prove that the control board itself has failed. Tell the technician whether the problem began after a power interruption or electrical work. Leave voltage checks, panel access and corrective work to qualified personnel. Do not repeatedly cycle power or replace protective devices to force the machine to run.

Official service manual, page 6 Official service manual, page 17 Official service manual, page 44 Official service manual, page 45

Ice buildup that returns after cleaning

Persistent ice buildup can involve scale, uneven water distribution, restricted flow, sensing trouble or a refrigeration fault. Cleaning history helps narrow the investigation, but a clean-looking surface does not rule out an internal problem. The reviewed KM-1340 H rows also use a different harvest-pump arrangement from some other KM machines. Describe where the ice remains and when production changed. Leave thawing, internal inspection and control adjustments to qualified service; do not copy another model's switch settings.

Official service manual, page 17 Official service manual, page 38 Official service manual, page 39 Official service manual, page 40 Official service manual, page 46 Official service manual, page 49

Keep routine care separate from internal service

The reviewed schedule calls for daily scoop cleaning with a neutral cleaner and a thorough rinse, plus monthly exterior care. Include any external water filters in monthly maintenance checks. Arrange the specified yearly cleaning and sanitation of the machine and bin liner using the exact instruction manual or maintenance label; water quality and operating conditions may require more frequent attention. Have condenser care matched to the model and its location. Do not assume every variant has the same air filters or approach a remote condenser that is not safely accessible.

Official service manual, page 7 Official service manual, page 55
Early KM-1340 H: after cleaning1 topic Back to models and manuals

KM-1340MAH/MWH/MRH early E-control edition; excludes MRH3 and unverified replacement controls. | Document: 73135 | Issued: 2006-10-16 | Revised: 2006-11-30

Ice making did not resume after cleaning

If production stopped immediately after cleaning, tell the technician before assuming the compressor has failed. This early design prevents compressor operation when the cleaning valve is not fully closed. Have the cleaning setup checked by qualified service; do not open panels or bypass the interlock.

Official service manual, page 51
Early KM-1340MAH: air-filter care1 topic Back to models and manuals

KM-1340MAH air-cooled filter guidance, early E-control edition. | Document: 73135 | Issued: 2006-10-16 | Revised: 2006-11-30

Include the air filter in early KM-1340MAH maintenance

A loaded mesh filter can reduce output on this air-cooled model. Its early maintenance guidance calls for checking the filters at least twice a month. Include filter condition in scheduled care, and have persistent low production investigated. This filter guidance does not apply to the water-cooled MWH system.

Official service manual, page 5 Official service manual, page 39 Official service manual, page 54
Early KM-1340 H: operating conditions and downtime2 topics Back to models and manuals

KM-1340MAH/MWH/MRH instruction edition; excludes MRH3. Match the unit documentation; no inferred serial or controller boundary. | Issued: 2005-08-11

Lower output when the kitchen or incoming water gets hotter

Lower output during hotter conditions is useful diagnostic information, not proof of a failed component. This edition specifies air at 45-100 F and incoming water at 45-90 F. Report persistent changes to your technician; do not adjust controls to compensate.

Official instruction manual, page 11

Plan for extended downtime and freezing conditions

Before extended downtime or freezing exposure, ask qualified service to prepare the machine. Switching it off alone does not remove trapped water. The MWH also needs attention to its separate condenser-water circuit. Leave internal draining and restart preparation to the technician.

Official instruction manual, page 2 Official instruction manual, page 22 Official instruction manual, page 23
KM-900 H modular crescent cubers5 topics Back to models and manuals

KM-900MAH/MWH/MRH/MRH3, reviewed E-control edition. Match the installed bin control and full serial. MWH specification ranges are L00001D-M20500D and M30501D onward. Timer statements differ within this edition; no universal limit is assumed. | Document: 73105 | Issued: 2003-01-28 | Revised: 2007-04-12

Record the repeating beep pattern

Record the beep count and pauses for your technician. One brief startup sound differs from a recurring alarm. The reviewed E controller distinguishes temperature, cycle-time and voltage protection. Avoid repeated resets or opening electrical panels.

Official service manual, page 17 Official service manual, page 18

A full bin and delayed stopping

Stopping behavior depends on the installed bin control and cycle stage. Four- or five-beep alarms belong to the mechanical-bin circuit in this edition. Report persistent overfilling; do not bypass the control or copy another model's settings.

Official service manual, page 18 Official service manual, page 26 Official service manual, page 28

Slow output or ice that will not release

Scale, restricted water flow, sensing faults or refrigeration trouble can slow production. Note whether ice stays attached or cycles take longer. A three-beep alarm needs model-specific timer review, not an automatic diagnosis or a universal minute limit.

Official service manual, page 18 Official service manual, page 23 Official service manual, page 24 Official service manual, page 26 Official service manual, page 51

Small cubes or water collecting in the bin

Small cubes can involve water delivery or drainage; unusual melting can involve a blocked bin drain. Tell the technician which changed first. Leave internal valve, pump and drain inspection to qualified service.

Official service manual, page 50 Official service manual, page 52

Routine care matched to your machine

Keep the scoop and bin clean, rinse thoroughly, and reserve the bin for ice. Follow the machine's own labels. Arrange condenser care for the actual cooling type; the air-condenser schedule does not apply to MWH.

Official service manual, page 73
KM-650 H modular crescent cubers6 topics Back to models and manuals

KM-650MAH/MWH/MRH, manual 73196 revised 2016-09-21. Match installed E/G controls, bin type and auxiliary code. Diagrams: MAH/MWH V-1 and earlier (p86), V-2 to C-2 (p95), D-1 and later (p96); MRH V-1 and earlier (p87), V-2 to C-1 (p97), C-2 and later (p98). Pages 86-87 omit harvest pump timer relays; pages 95-98 include them. These are literal document boundaries, not production dates or permission to change settings. | Document: 73196 | Issued: 2013-04-29 | Revised: 2016-09-21

Repeated beeps and controller indicators

Count the beeps in each repeating group before calling for service. In this manual's E/G alarm tables, one beep points to excessive evaporator temperature, two to repeated harvest timeouts, and three to repeated freeze timeouts. Six and seven identify low- and high-voltage protection. These signals narrow the technician's checks; they do not identify a failed part by themselves. E boards also use H TIMER and F TIMER lights for the corresponding timeouts. Those are internal board indicators, not a front-panel error display. A single G-board startup beep is different from a repeating shutdown alarm. Report the pattern and whether ice production stopped; leave panel removal, electrical checks and alarm resets to a qualified technician.

Official service manual, page 17 Official service manual, page 42 Official service manual, page 43 Official service manual, page 44 Official service manual, page 45

An empty bin but no restart, or ice piling too high

KM-650 specifications allow thermostatic or mechanical bin control, so a full-bin shutdown does not have one universal restart test. A thermostatic control can stop production in unusually cold surroundings even when the bin is empty. With a mechanical control, mineral buildup can restrict the sensing paddle, and shutdown timing depends on the operating cycle. On a G board, BC OPEN and BC CLOSED describe the bin-control input, not a diagnosis of the refrigeration system. Tell the technician whether the machine stopped with a full bin, stayed off after ice was removed, or kept making ice above its normal level. Do not reposition the sensor, defeat the bin control or adjust it to force production.

Official service manual, page 31 Official service manual, page 32 Official service manual, page 33 Official service manual, page 37 Official service manual, page 43

Longer cycles and less ice between busy periods

When a KM-650 still makes ice but cannot keep up, note whether the delay occurs while ice forms or while it releases. Restricted water flow, mineral deposits and uneven water distribution can prolong production. A dirty condenser, a water valve that leaks during freezing, poor pump circulation or a refrigeration fault are other possibilities in the service chart. Remote KM-650MRH equipment also has condenser-pressure controls that need the correct remote-system checks. Record recent filter service, cleaning and changes in output for the visit. Extending a freeze timer or changing harvest pump timing can conceal a problem or damage the machine; the technician should match the installed controller and factory configuration first.

Official service manual, page 37 Official service manual, page 39 Official service manual, page 40 Official service manual, page 46 Official service manual, page 49

Ice remains on the evaporator or builds into a thick layer

Repeated ice buildup after harvest needs more than a longer cleaning cycle. The KM-650 troubleshooting context includes scale on the evaporator, blocked or misaligned water distribution parts, insufficient incoming water, a sticking float and faults in the harvest or refrigeration circuit. On configurations using a G-board harvest pump timer, incorrect settings are another service consideration; earlier configurations do not share that same timer arrangement. Tell the technician whether buildup started after cleaning or control work and whether a repeating alarm followed. Leave internal ice removal, water-system disassembly and controller adjustments to service personnel so the underlying release or water-flow problem can be found.

Official service manual, page 17 Official service manual, page 38 Official service manual, page 39 Official service manual, page 46 Official service manual, page 49

Scoop hygiene, filter records and scheduled cleaning

Wash the ice scoop daily with a neutral cleaner and rinse it thoroughly. Keep the exterior clean with a soft cloth, and include the bin door in routine care. The maintenance table calls for monthly attention to external water filters and annual cleaning and sanitizing of the machine and bin, with more frequent work when water quality or the operating environment requires it. Inspect air filters where fitted; do not assume a water-cooled KM-650MWH has the same air-filter arrangement as a KM-650MAH. Keep a record of filter changes and sanitation visits. Internal cleaning, inlet-screen work, hose checks and condenser service belong with a qualified technician following the matching instructions or maintenance label, not an improvised chemical recipe.

Official service manual, page 55

Planning a long shutdown or exposure to freezing conditions

An extended closure or a location that may freeze calls for proper water-system preparation, not just leaving the ice machine idle. Tell the service technician how long the KM-650 will be out of use and whether freezing temperatures are possible. The manual's KM-650 tank-draining arrangement differs from the overflow-pipe method shown for larger KM-1340 units, so those instructions should not be interchanged. Have the matching shutdown procedure completed for the machine's water and condenser configuration. Do not run WASH with an empty tank; the manual warns that this can damage the water pump.

Official service manual, page 17 Official service manual, page 56
KM-600MAH air-cooled crescent cuber6 topics Back to models and manuals

KM-600MAH only; p66 allows thermostat or mechanical bin control. Shared E/G diagram p85 is without harvest pump timer relays. No KM-650 auxiliary boundary or installed-controller assignment is inferred. | Document: 73196 | Issued: 2013-04-29 | Revised: 2016-09-21

KM-600MAH early E-control edition; thermostat on p19. Not a mechanical-bin or replacement-controller routing rule. | Document: 73167 | Issued: 2008-08-12 | Revised: 2008-08-25

KM-600MAH instruction edition; p13 uses an actuator paddle. No serial transition is supplied by the reviewed pages. | Issued: 2008-06-24 | Revised: 2010-03-31

Early E-control unit: repeating beeps

On the early E-control edition, repeating groups of one, two, or three beeps indicate high evaporator temperature, a harvest timeout, or a freeze timeout. Six and seven indicate low and high supply voltage. H TIMER and F TIMER are internal board indicators, not front-panel display messages. Record the pattern for service; do not open the control box or repeatedly reset a shutdown.

Official 2008 service manual, page 11 Official 2008 service manual, page 12 Official 2008 service manual, page 13

Small or irregular cubes

Small cubes can accompany restricted water flow or water loss through the pump-out check valve. Scale and dirty water-distribution parts can also distort the ice. Tell the technician whether cube size changed gradually or suddenly, and provide the water-filter service history. Appearance alone does not identify a failed component.

Official 2008 service manual, page 30

Bin full, bin empty, or unexpected stopping

KM-600MAH documentation covers both thermostatic and mechanical bin controls. They do not use the same sensing method or stopping sequence. A thermostatic unit can stop with an empty bin when ambient temperature falls below 45 F; a mechanical unit may need its paddle and shutdown sequence checked. Report the ice level and room conditions when stopping occurs. Have a technician identify the fitted control before testing it; never bypass the bin shutoff.

Official service manual, page 31 Official service manual, page 32 Official service manual, page 33

Brief drain flow between ice-making cycles

A short pump-out is part of normal operation, so drain flow at a cycle transition is not automatically a leak. The combined manual lists a ten-cycle factory pump-out interval for KM-600MAH, but the first pump-out differs between E and G controls. This is not a setting to copy onto an unidentified board. Report continuous water loss, unusually small cubes, or a new change in drain behavior; leave timer and switch adjustments to service.

Official service manual, page 46 Official service manual, page 47 Official service manual, page 48

No ice after cleaning

If ice production stops immediately after cleaning, tell the service technician what work was performed. In this instruction edition, an incompletely closed cleaning valve prevents compressor operation. The technician should verify the valve and operating configuration before diagnosing refrigeration failure. Do not run WASH with an empty tank or attempt an internal adjustment yourself.

Official instruction manual, page 13 Official instruction manual, page 14

Airflow, sanitation, and planned downtime

Arrange qualified maintenance with air-filter checks at least twice monthly, a yearly condenser inspection, and cleaning and sanitizing at least annually; site conditions can require more frequent attention. Keep the bin reserved for ice and use the scoop with clean hands. For extended closure or freezing conditions, arrange proper draining: switching the machine off alone does not remove trapped water.

Official instruction manual, page 14 Official instruction manual, page 17 Official instruction manual, page 18
KM-500 H modular crescent cubers6 topics Back to models and manuals

KM-500MAH/MWH/MRH only, early E-control edition. KM-500MWH reference sheets use L00001D - M20960C (p6) and M30961D - (p7); neither range selects an installed controller or bin type. Mechanical-bin topics do not apply to thermostatic controls. The p21 KML labels are a source discrepancy, not KM aliases or approved switch settings. | Document: 73104 | Issued: 2002-11-07 | Revised: 2003-12-16

Include the entire model and serial number

For a KM-500MAH, KM-500MWH or KM-500MRH service request, copy the full model and serial number from an accessible label or existing records. The water-cooled KM-500MWH has separate serial-specific reference sheets, so the family name alone is not enough. A technician also needs to identify the fitted controller and bin control before selecting a procedure. Do not shorten the model to KM-500, substitute a KML name or remove a cover to gather this information.

Official service manual, page 1 Official service manual, page 3 Official service manual, page 14 Official service manual, page 21 Official service manual, page 26

Four or five recurring beeps need the correct bin-control context

For the E controller described in this manual, four recurring beeps indicate a short circuit in the bin-control connection, while five indicate an open circuit. These entries apply only to the mechanical-bin configuration. They identify a circuit condition, not proof that replacing the sensor will fix it. Record the repeating count for qualified service. Do not open the electrical compartment, bridge connections or reset the board to suppress the warning.

Official service manual, page 14 Official service manual, page 16 Official service manual, page 26

Long-cycle alarms on this older controller

With the covered E controller, a recurring two-beep pattern identifies a defrost cycle exceeding 20 minutes; three beeps identify a freeze cycle exceeding 60 minutes. Later-controller rules should not be used to reinterpret these limits. Report the count, whether production stopped and any recent water or power interruption. Sensing, valve operation and refrigeration performance are possible investigation areas, not confirmed failed parts. A brief startup beep is different from a repeating alarm. Leave safety resets and timer adjustments to the technician.

Official service manual, page 14 Official service manual, page 15 Official service manual, page 16 Official service manual, page 20

A full bin does not always stop this configuration immediately

On the mechanical-bin arrangement documented here, stopping depends on when the full-bin signal occurs. A signal received after the first five minutes of freezing allows that freeze and its following harvest to finish before the machine stops. This is not a rule for every Hoshizaki bin control. Describe continued production or overfilling to the technician; do not force the lever, bypass the control or assume persistent overfilling is normal.

Official service manual, page 26

Small, cloudy or irregular ice needs more than a visual diagnosis

Note whether the change affects cube size, clarity, release or the amount of ice made. Include the cleaning history and any known change in water supply or filtration. Water distribution, deposits, water quality and cycle performance can produce overlapping symptoms, so appearance alone does not identify a failed component or show that ice is safe to use. Do not chip ice from internal surfaces or adjust the controls to compensate for a change in production.

Official service manual, page 44 Official service manual, page 45

Use the maintenance instructions for this machine

Wash your hands before handling ice and use the provided scoop. Keep other stored items out of the ice bin. Clean the scoop and bin liner with a neutral cleaner and rinse thoroughly; wipe the exterior with a soft cloth. Follow the machine's own instructions and labels for scheduled sanitation. This manual calls for a yearly condenser check on non-water-cooled versions, with more frequent care where conditions require it. Arrange qualified access for that work rather than opening panels or reaching an inaccessible condenser.

Official service manual, page 67
KM-1800 S H modular crescent cubers6 topics Back to models and manuals

Exact SAH/SAH3, SWH/SWH3 and SRH/SRH3 models only; keep phase suffixes. Factory/service E-control differences and thermostatic bin control remain distinct. The water-supply shutdown topic is SWH/SWH3 only; air-filter care is air-cooled only. No universal freeze timer or production-date range. | Document: 73131 | Issued: 2005-11-11 | Revised: 2007-05-24

Keep the electrical suffix with the model number

The final 3 in KM-1800SAH3, KM-1800SWH3 or KM-1800SRH3 identifies a separately documented three-phase version. Include it, the serial number and a description of the problem when requesting service. If more than one machine is present, identify which unit stopped or changed its output. The manual distinguishes factory and service controller versions; a family name or a similar-looking board is not enough to select the correct procedure. Use accessible labels or existing records without opening an electrical compartment.

Official service manual, page 1 Official service manual, page 2 Official service manual, page 3 Official service manual, page 19

Water filling without a normal ice cycle

This family checks water level before allowing normal production. Continued filling can be a protective response when the water-level signal is not satisfied, but restricted supply, float sensing and control faults can create similar symptoms. Report whether a water interruption or filter change preceded the problem and whether filling continues. Do not reach into the tank, force the float or bypass the water-level protection to make the machine run.

Official service manual, page 16 Official service manual, page 20 Official service manual, page 41 Official service manual, page 42

Record the repeating alarm before service

For the controls documented here, two recurring beeps indicate two successive harvests exceeding 20 minutes. Three indicate two successive freezes exceeding the configured limit, not a universal 60-minute limit. One beep points to high evaporator temperature; six and seven identify low- and high-control-voltage protection. A short beep at switch-off is a different event. Give the technician the repeating count and any existing service notes about H TIMER or F TIMER. Do not open a live panel, reset a safety or change timer settings to clear the symptom.

Official service manual, page 19 Official service manual, page 20 Official service manual, page 21 Official service manual, page 24

Stopped with an empty bin or continuing with a full one

The thermostatic bin control described for this family can stop production in a room below 45 F even when the bin is empty. Continued production with a full bin needs a different investigation into the bin-control condition. Report the room temperature and what the bin was doing when the symptom appeared. Do not heat or reposition the sensing bulb, adjust the thermostat or borrow a mechanical-bin test from another KM model.

Official service manual, page 24 Official service manual, page 40 Official service manual, page 45

A water-cooled unit stopped after a water interruption

On KM-1800SWH and KM-1800SWH3, loss of condenser-water supply can stop operation through pressure protection. Include any known building-water interruption and the timing of the shutdown in the service request. This is a possible cause, not proof of a defective pressure switch or compressor. Do not apply remote-condenser or air-cooled fan advice to this version, adjust the water-regulating valve or repeatedly restart the unit to overcome a protective stop.

Official service manual, page 20 Official service manual, page 41 Official service manual, page 43

Use the care schedule for the cooling configuration

For the air-cooled version, the manual calls for checking its mesh air filters at least twice a month and cleaning them when clogged. Have a technician handle access that requires panel removal or reaching moving parts. Air-cooled and remote air-cooled condensers need a yearly check, with more frequent attention where conditions require it. Keep the bin for ice only, use the provided scoop and thoroughly rinse the scoop and liner after cleaning with a neutral cleaner. Follow the exact machine instructions for sanitation; these checks do not replace it.

Official service manual, page 61
KM-1601MRH and MRH3: E-control edition6 topics Back to models and manuals

Exact MRH and three-phase MRH3 only. Match the installed E control and thermostatic bin arrangement. URC-21F/URC-22F configuration references do not authorize replacement compatibility. Identity-topic specification headers are not reviewed performance data. | Document: 73129 | Issued: 2006-06-16 | Revised: 2011-03-28

Match the complete model before service

Keep the complete ice-machine model and serial number with your service request, including the final 3 on KM-1601MRH3. This manual distinguishes single-phase and three-phase machines and shows configurations with URC-21F or URC-22F remote condensers. Give the technician any available condenser identification and prior repair records. Similar cabinet names do not establish matching controls or replacement compatibility; the installed controller still needs to be identified.

Official service manual, page 3 Official service manual, page 6 Official service manual, page 7 Official service manual, page 8 Official service manual, page 9 Official service manual, page 17

Record a repeating beep pattern

For the E-controller documented in this edition, count the beeps in each repeating group. One indicates high evaporator temperature; two indicate repeated overlong harvest cycles; three indicate repeated freeze cycles exceeding the configured limit. Six or seven indicate a control-voltage problem. A brief beep when the switch is turned off is a different event. Tell the technician the count and what the machine was doing. Do not repeatedly reset the alarm, adjust timer switches or open the electrical compartment to investigate.

Official service manual, page 18 Official service manual, page 19 Official service manual, page 21

An empty bin does not rule out bin-control shutdown

If production stops with room left in the bin, note whether the surrounding area has become unusually cold. This manual identifies ambient temperatures below 45 degrees F as a condition that can hold the thermostatic bin control open. Power, pressure-protection and other control problems can also stop production. An unlit POWER OK lamp, if already observed by a technician, is not enough to condemn the board. Leave the sensing bulb and wiring in place; do not warm, reposition or bypass the control.

Official service manual, page 32 Official service manual, page 36

Slow output or ice that will not release

Tell the technician whether water fills normally, whether ice forms, and whether it releases into the bin. That sequence helps separate a water-flow problem from a long freeze or harvest cycle. Scale, restricted water flow, poor distribution and cold conditions are possible contributors; sensing, valve and refrigeration faults may need testing as well. Do not chip ice from the evaporator or change timer settings to force a release. A recurring alarm or continuing drop in output needs a model-specific assessment.

Official service manual, page 13 Official service manual, page 14 Official service manual, page 37 Official service manual, page 38 Official service manual, page 39 Official service manual, page 40

Changes in cube shape or excess water in the bin

Small, cloudy or irregular cubes can have more than one cause, including water quality, deposits, uneven water distribution or abnormal cycle conditions. Melting ice and excess water in the bin may involve drainage or water escaping its intended path. Describe when the change began and whether it follows a water-supply change or recent service. Appearance alone cannot establish that ice is safe to use. Have persistent problems assessed without modifying drain plumbing or adding treatment equipment based only on the symptom.

Official service manual, page 41

Keep ice-contact areas clean and remote equipment serviceable

Wash your hands before handling ice, use the supplied plastic scoop and keep the bin for ice only. Clean the scoop and bin liner with a neutral cleaner and rinse as directed by the manufacturer; follow the exact machine instructions and chemical labels for sanitation. Wipe the exterior occasionally with a soft cloth and neutral cleaner. The manual calls for a yearly condenser check, with cleaning when needed and more frequent attention in demanding locations. Arrange qualified service for rooftop or inaccessible remote equipment. Do not remove electrical panels or climb to a condenser for a routine owner check.

Official service manual, page 49
KM-1601MRH and MRH3: later G-control context4 topics Back to models and manuals

Supplement for documented G controls, not an automatic replacement for the E edition. Match board, bin arrangement and repair history; BC OPEN is not necessarily a physically full bin. No serial cutover, switch settings or other cover-family applicability inferred. | Document: 73196 | Issued: 2013-04-29 | Revised: 2016-09-21

A startup beep is different from a repeating alarm

On the G-controller described in this edition, a single beep when the control is moved to ICE is a normal startup event. Repeating groups of beeps need a different response: record the count and whether the machine stops or continues making ice. Do not use an older E-controller description to identify this sound. Recurring groups of one, two, three, six or seven beeps relate to temperature, cycle-time or control-voltage protection. Arrange service rather than repeatedly resetting the machine or opening its electrical compartment.

Official service manual, page 44 Official service manual, page 45

No restart after control work

If your KM-1601MRH or KM-1601MRH3 stopped restarting after control work, provide the technician with the model, serial number and repair record. The E and G boards do not use every connection or switch in the same way. On a thermostatic-bin machine, a BC OPEN indication already observed by a technician does not necessarily mean the bin is physically full. Have the installed board and model-specific control arrangement checked. Do not move connectors, add a jumper or bypass the bin control yourself.

Official service manual, page 17 Official service manual, page 31 Official service manual, page 43 Official service manual, page 46 Official service manual, page 48 Official service manual, page 49

Ice buildup needs more than a longer timer

Ice that stays on the evaporator or output that keeps falling can involve scale, restricted water flow, poor water distribution or sensing and refrigeration problems. A different timer setting will not establish which cause is present. This model's documented G-board setup also differs from other machines that run a pump near the end of harvest. Tell the technician whether the problem follows cleaning, a water-filter change or a board repair. Do not chip away the ice, change internal switches or assume another KM model's settings apply.

Official service manual, page 38 Official service manual, page 39 Official service manual, page 40 Official service manual, page 46 Official service manual, page 49

Use the schedule for the applicable manual edition

The later combined manual calls for daily scoop cleaning with a neutral cleaner and a thorough rinse, plus monthly exterior care. If external water filters are installed, include them in the monthly service checks. Arrange at least the manual's yearly cleaning and sanitation of the machine and bin liner, and a yearly condenser inspection with cleaning when needed. Water quality and operating conditions may require more frequent attention. Use the machine's exact instructions and maintenance label; leave internal, electrical and inaccessible remote-condenser work to qualified service personnel.

Official service manual, page 55
KM-350, 420, 520 and 660 J/Z cubers6 topics Back to models and manuals

Keep J and JZ suffixes distinct. 2A8242 ultrasonic, 2A8242 No FTC mechanical and 2A9678 ultrasonic contexts are not interchangeable. Literal auxiliary ranges and gaps remain in the review packet; no automatic serial routing. Blink-only meaning and lens care are board/sensor specific. Bi-Weekly is not converted to a numeric interval. | Document: 73230 | Issued: 2018-10-29 | Revised: 2026-07-07

Include the complete model and unit information

Send the complete model designation, including the final J or JZ, plus the serial and auxiliary-code information already available on the unit's label or service records. Include the condenser model if it is recorded for a remote system. These KM machines span different controls and bin sensors. A matching family name alone does not identify the right service procedure; leave control-board identification to the technician and do not remove covers to obtain it.

Official service manual, page 1 Official service manual, page 2 Official service manual, page 4 Official service manual, page 20 Official service manual, page 28 Official service manual, page 34

A recurring one-beep alarm

A brief sound at startup is different from a recurring alarm. On the control boards covered by this manual, a recurring one-beep alarm indicates excessive evaporator temperature. Harvest controls, temperature sensing or unusually hot incoming water are possible causes, not confirmed failed parts. Record when the sound begins and whether ice production has stopped. Arrange qualified service; do not open the control box or reset the safety to keep the machine running.

Official service manual, page 20 Official service manual, page 28 Official service manual, page 34 Official service manual, page 63 Official service manual, page 64

Two or three beeps with interrupted ice production

For the listed controls, two beeps identify repeated overlong harvest cycles; three identify repeated overlong freeze cycles. Water circulation, sensing, valves and refrigeration performance can produce different versions of these symptoms. Tell the technician the beep count, whether ice was releasing normally before the interruption, and when production changed. The count narrows the investigation but does not establish that a pump, sensor or compressor needs replacement. Do not change timers or bypass a protection.

Official service manual, page 20 Official service manual, page 28 Official service manual, page 34 Official service manual, page 63 Official service manual, page 64

Six or seven beeps

On the covered boards, six beeps indicate low-voltage protection and seven indicate high-voltage protection. Report the pattern and any recent power interruption. These alarms call for qualified checks of the electrical supply and equipment; they are not a reason to replace a control board without diagnosis. Do not probe live wiring, change electrical connections or repeatedly restart the machine.

Official service manual, page 20 Official service manual, page 28 Official service manual, page 34 Official service manual, page 63 Official service manual, page 64

A reported blinking control-board light

If a service record already notes a blinking POWER light, include that observation when requesting repair. The 2A9678-01 and 2A9678-02 boards use a blink-only indication for a freeze-up detection cycle. The older board table is different, so this meaning must not be assigned to every KM unit. This is a board indicator, not a universal screen error code. Do not remove a cover to look for it or reset the board to clear it.

Official service manual, page 20 Official service manual, page 28 Official service manual, page 34 Official service manual, page 63 Official service manual, page 64

Keep routine care specific to the fitted equipment

Clean and thoroughly rinse the scoop daily. Keep a record of filter inspections, exterior cleaning and scheduled ice-machine and bin sanitation. A monthly water-filter check does not automatically mean a new cartridge every month. Lens cleaning applies only to units with the appropriate bin sensor; mechanical controls require their own applicable guidance. Have qualified personnel handle internal service, and use the exact instruction manual or machine label for sanitation. Water quality and operating conditions may require more frequent care than the schedule's general guideline.

Official service manual, page 20 Official service manual, page 28 Official service manual, page 34 Official service manual, page 79
KMS-822MLJ remote ice-making system6 topics Back to models and manuals

KMS-822MLJ only, documented J board and lever-actuated proximity bin control. SRK-10J is separate condensing-unit context, not another ice-machine model. Ext. Harvest is unused here; WRV and BC-jumper source questions are not owner repair instructions. No ultrasonic-lens care or invented serial range. | Document: 73228 | Issued: 2018-08-09 | Revised: 2018-10-19

Include the ice machine and remote-unit information

For a KMS-822MLJ, include the full model and serial information and the SRK-10J details already available in your equipment records. Report whether the problem started after a power interruption or service visit. This system includes a separate condensing unit, so a stopped ice machine does not identify which section needs repair. Do not remove panels or access an elevated remote unit to collect information. The ice-machine OFF switch does not make all internal electrical parts safe to touch.

Official service manual, page 1 Official service manual, page 2 Official service manual, page 5 Official service manual, page 6

Stopping as the storage bin fills

The KMS-822MLJ uses a lever-actuated bin control. A full bin can stop ice production normally, and the stopping point depends on the cycle already in progress. A short delay is not by itself proof of a failed control board. Tell the technician whether the bin was full, whether production stayed off after normal ice use, or whether ice continued accumulating unexpectedly. Do not hold, bend or bypass the sensor to force the machine to run.

Official service manual, page 22 Official service manual, page 23 Official service manual, page 28

No new ice with space still in the bin

Record when production stopped, whether any alarm can be heard, and any known interruption to the building's water or power. Have the last water-filter service date available. Supply problems, restricted filtration, bin-control trouble and faults in the remote condensing system can all interrupt production. The symptom alone does not prove a compressor or board failure. Leave fuse, wiring, sensor and refrigeration checks to qualified service personnel; do not repeatedly reset a breaker or protection.

Official service manual, page 6 Official service manual, page 12 Official service manual, page 28 Official service manual, page 29

Less ice or ice that is not releasing normally

Describe whether batches arrive less often, ice release has changed, or visible ice buildup has appeared. Scale, restricted water flow, dirty water-distribution components and condenser fouling are possible causes; sensing, valve or refrigeration faults can look similar. Share the filter and cleaning history so the technician can distinguish an overlong freeze from a harvest problem. Do not chip ice from internal parts, alter cycle settings or assume that adding refrigerant is the solution.

Official service manual, page 29 Official service manual, page 30 Official service manual, page 31

Record the repeating beep pattern

A brief startup beep is different from a repeating alarm. For the documented J control board, one beep points to high evaporator temperature, two to repeated long harvest cycles and three to repeated long freeze cycles. Six and seven identify low- and high-voltage protection. Record the count and when production changed. These are safety indications, not a diagnosis of a specific failed part. Do not open the control box, perform an output test or reset the safety to keep making ice.

Official service manual, page 12 Official service manual, page 34 Official service manual, page 35

Keep care records for both parts of the system

Clean and thoroughly rinse the scoop daily, and record filter checks, surface cleaning and professional maintenance of the remote condensing unit. A monthly water-filter inspection does not necessarily require a new cartridge. This model's mechanical bin control should not be treated as an ultrasonic lens sensor. Use the exact instruction manual or maintenance label for sanitation, with frequency adjusted for water quality and operating conditions. Arrange proper preparation before extended non-use or freezing conditions; do not improvise internal cleaning or draining procedures.

Official service manual, page 6 Official service manual, page 22 Official service manual, page 46
KM-901, 1100, 1340 and 1601 J cubers6 topics Back to models and manuals

Only the listed exact J/MRJ3 identities. Dedicated thermostatic-bin guidance is not mechanical or ultrasonic sensor guidance. Freeze correction is conditional on 2A7664-02 and its enabled function, not every J board. Retain generic G/E references, missing table detail and step self-reference as anomalies; no inferred replacement or serial boundaries. | Document: 73213 | Issued: 2018-01-30 | Revised: 2020-11-23

Keep the full suffix in the service request

Record the complete model and serial information from an accessible label or existing service record. Keep the final 3 when the model ends in MRJ3; it distinguishes a separately documented electrical version. For a remote setup, include the condenser model already listed in your records. These machines use more than one control-board version, so the family name alone is not enough to select a procedure. Do not remove covers or visit an inaccessible condenser to collect identification.

Official service manual, page 1 Official service manual, page 2 Official service manual, page 4 Official service manual, page 16 Official service manual, page 36 Official service manual, page 38

Stopped production with an empty bin in a cold room

The thermostatic bin control described for these machines can stop production when the surrounding temperature falls below 45 F, even if the bin is empty. Report the room conditions and whether the problem appeared after a temperature change. That observation helps distinguish an operating-condition issue from a failed component; it does not rule out other faults. Do not warm, move or adjust the sensing bulb, and do not bypass the control to force ice production.

Official service manual, page 6 Official service manual, page 26 Official service manual, page 30

An unusually long cycle with a recorded blinking indicator

If an existing service observation notes blinking POWER OK or EXT HARVEST lights, include it with the service request. The manual describes a 90-minute freeze-time correction function for the 2A7664-02 board when enabled. Repeated corrections can add a second blinking indication, and the lights can remain blinking after ordinary operation resumes. This behavior must not be assigned to every J board. Have a technician identify the fitted control; do not open the panel, change switch settings or reset the board to erase the indication.

Official service manual, page 23 Official service manual, page 24 Official service manual, page 36 Official service manual, page 37 Official service manual, page 38 Official service manual, page 41

Beep counts are clues, not parts diagnoses

For the covered controls, recurring one-, two- and three-beep alarms point to high evaporator temperature, repeated long harvests and repeated long freezes, respectively. Six and seven indicate low- and high-voltage protection. A brief beep at startup is a separate event. Record the repeating pattern and whether ice production has stopped. Water circulation, sensing, valves and refrigeration performance are possible investigation areas, not proof that a particular part has failed. Leave electrical checks and safety resets to qualified service.

Official service manual, page 16 Official service manual, page 37

Describe the change in ice release or production

Tell the technician whether the machine stopped completely, batches became less frequent, or ice no longer releases normally. Provide the filter and cleaning history and any known water or power interruption. Scale, restricted water distribution, condenser fouling and control or refrigeration problems can produce similar symptoms. The relevant checks also depend on whether the unit is air-cooled, water-cooled or remote. Do not chip internal ice, alter timers or assume that a refrigerant charge will solve low output.

Official service manual, page 30 Official service manual, page 31 Official service manual, page 32 Official service manual, page 33

Match routine care to the installed configuration

Clean and thoroughly rinse the scoop daily, and keep records of filter checks, exterior care and scheduled sanitation. A monthly water-filter check does not automatically mean replacing the cartridge every month. Arrange qualified condenser and internal-system maintenance for the actual cooling configuration. The thermostatic bin sensor should not be cleaned or manipulated as though it were an ultrasonic lens or a mechanical paddle. Follow the exact instruction manual or machine label for sanitation; water quality and operating conditions may call for more frequent care than the general schedule.

Official service manual, page 26 Official service manual, page 48
Valiance VF1A-FS / VF2A-FS freezer guidance4 topics Back to models and manuals

VF1A-FS and VF2A-FS appear on both covers. Display guidance requires the pictured e34B controller; not VUF/VWF dial controls. | Document: MAN-403-R-01 | Issued: 2025-03-19

Companion instruction manual | Issued: 2025-05-02

A warm cabinet, frost and condensation need different checks

Weak cooling, heavy frost and moisture around the cabinet are different symptoms. The VF service chart considers airflow, door closure, sensing, controls and the refrigeration system. Record the temperature, visible frost and any display message when requesting service; an iced evaporator alone does not identify a failed heater.

VRXA-FS_VFXA-FS_serv.pdf, page 13 VRXA-FS_VFXA-FS_serv.pdf, page 14

Keep the minus sign in a probe error

On the e34B controller in this VF guide, E1/-E1, E2/-E2 and E3/-E3 identify probe-error conditions. epr and err instead concern controller memory. Photograph the complete message, including its minus sign, for the technician. These labels are not instructions to replace a probe or control without testing.

VRXA-FS_VFXA-FS_inst.pdf, page 21 VRXA-FS_VFXA-FS_inst.pdf, page 22

Defrost and operating messages are not all faults

The VF e34B table separates operating messages from probe errors. dEF and PdF describe defrost-related states only with the documented ddL=Lb display configuration. A message that persists while the freezer fails to recover deserves service; do not change configuration parameters to make the message disappear.

VRXA-FS_VFXA-FS_inst.pdf, page 22

Clean safely and keep inspection separate from cleaning

Protect stored products and unplug the freezer before routine cleaning. Use mild soap for the cabinet and shelves. The VF service edition calls for an annual condenser inspection and cleaning when needed; dusty or greasy conditions may require attention sooner. Internal electrical and refrigeration work belongs to a qualified technician.

VRXA-FS_VFXA-FS_serv.pdf, page 27
Valiance VUF / VWF freezer guidance4 topics Back to models and manuals

Only the six listed VUF/VWF identities on MAN-416-R-01, revised July 21, 2026. PDF pages contain two printed pages. Refrigerator timers and VF e34B codes are not inherited. | Issued: 2025-09-30 | Revised: 2026-05-14

Companion service manual | Document: MAN-416-R-01 | Issued: 2025-03-04 | Revised: 2026-07-21

Describe cooling loss and frost separately

For these VUF and VWF freezers, inadequate cooling can involve power, airflow, sensing, control or refrigeration problems. Tell the technician whether the cabinet is warm, frost is accumulating, or condensation has changed. The symptom tables provide several possible causes, not a single part to order.

V_RXXA_V_FXXA_inst.pdf, page 28 V_RXXA_V_FXXA_inst.pdf, page 29

A control light needs its operating context

The dial-control legend separates operating mode, standby or alarm, and compressor or defrost states. Record which light is steady or flashing and whether cooling has stopped. A flashing light alone is not a failed-component diagnosis, and digital error codes from other Valiance controls do not apply automatically.

VURXXA_VUFXXA_serv.pdf, page 16

Do not borrow a refrigerator defrost schedule

These manuals distinguish freezer defrost from refrigerator operation. The instruction booklet also contains inconsistent timer wording between its operating section and troubleshooting table. If frost or poor recovery persists, have the installed control and defrost system checked instead of changing a timer to match another model.

V_RXXA_V_FXXA_inst.pdf, page 25 V_RXXA_V_FXXA_inst.pdf, page 29

Set a maintenance plan for the actual location

Keep routine cabinet care separate from filter and condenser service. The VUF/VWF instructions mix monthly cleaning prose with Bi-Weekly and Bi-Yearly table labels, so those labels are not a reliable single calendar schedule. Arrange a unit-specific plan that accounts for dust and grease. R290 circuit work is qualified-service work, not a cleaning task.

V_RXXA_V_FXXA_inst.pdf, page 26 V_RXXA_V_FXXA_inst.pdf, page 27
Steelheart side-mount and CF chef-base freezers4 topics Back to models and manuals

Service manual 73255, revised June 26, 2026, freezer branches only. Page 54 lists _LF sizes and CF(-L) variants; exact U/W and -L identities come from the individual manufacturer product pages. Match the installed controller. | Document: 73255 | Issued: 2025-09-08 | Revised: 2026-06-26

When the freezer warms or the evaporator ices

The freezer diagnostic branches include restricted heat rejection, fan trouble, sensing or control faults, refrigerant-circuit problems, and defrost heater or safety-thermostat faults. Note the cooling loss and visible ice before calling for service. Ice buildup does not by itself prove the heater has failed.

Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 31 Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 32

Read E1, E2 and voltage alarms accurately

In this controller table, E1/-E1 concerns the cabinet thermistor and E2/-E2 the defrost thermistor. The minus sign matters. Hi and Lo are temperature alarms; UHi and ULo are supply-voltage alarms. Save the exact display for a technician and do not bypass protection or attempt live voltage checks.

Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 38

Flashing icons can indicate a timed delay

A flashing compressor or evaporator-fan icon can mean the control is waiting through a delay; the defrost icon also distinguishes defrost from drip time. These states differ from an alarm. If cooling does not resume normally, report the icon pattern and cabinet condition instead of forcing repeated defrost cycles.

Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 34 Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 37

Filter care is not internal service

Air filters and the condenser need separate inspection and condition-based cleaning. The service table uses Bi-Weekly and Bi-Yearly labels without resolving a numeric schedule for your location. Turning the control off is not a substitute for unplugging before maintenance. Access to internal parts and equipment mounted above a chef base needs qualified handling.

Steelheart_Side-Mount_Equip_Stand_Serv.pdf, page 48
Steelheart F1A / F2A / PTF1A: later-control freezer guidance5 topics Back to models and manuals

Manual 73282, issued July 31, 2026: F1A auxiliary Q-7 and later; F2A Q-8 and later; PTF1A R-5 and later. No automatic serial conversion, replacement-controller assumption or coverage of the gap between PTF1A Q-5 and R-5. | Document: 73282 | Issued: 2026-07-31

Match the auxiliary code before using this guide

The later freezer service manual starts at F1A Q-7, F2A Q-8 and PTF1A R-5 auxiliary codes. A model name alone does not select this controller generation. Provide the complete data plate and a display photo when requesting service, particularly if the control has been replaced.

Steelheart_UR_A1_E_serv.pdf, page 1

Warm cabinets and recurring frost have several possible causes

The later-control freezer charts separate cooling loss from evaporator icing and defrost faults. Possible causes include heat-rejection restrictions, fan problems, thermistor or control faults, defrost components and refrigeration-circuit problems. A technician must test the relevant system before selecting a replacement part.

Steelheart_UR_A1_E_serv.pdf, page 33 Steelheart_UR_A1_E_serv.pdf, page 34

oP and E1/-E1 are not the older dor and E01 labels

For this later control, oP is the door-switch alarm, E1/-E1 concerns the cabinet thermistor and E2/-E2 concerns the defrost thermistor. Hi and Lo indicate temperature alarms. Close an obstructed door normally; if the alarm remains or returns, record it for service. Do not translate these labels into older-control codes.

Steelheart_UR_A1_E_serv.pdf, page 39

dEF and Pdf describe stages of recovery

This edition uses dEF during defrost and Pdf after the defrost sequence while the display returns toward normal temperature reporting. Compressor and fan icons may flash during delays. Continued warming or failure to recover requires diagnosis; these messages alone do not justify replacing the control or repeatedly forcing defrost.

Steelheart_UR_A1_E_serv.pdf, page 35 Steelheart_UR_A1_E_serv.pdf, page 38

Inspect filters, condenser and condensate parts separately

This freezer service edition calls for checking the air filter at least twice a month, with cleaning when clogged, and checking the condenser annually with cleaning as needed. The condensate wick is a separate maintenance item. Protect frozen products and unplug the cabinet before maintenance; have inaccessible or internal parts serviced professionally.

Steelheart_UR_A1_E_serv.pdf, page 50
Steelheart F3A and earlier F1A / F2A / PTF1A controls4 topics Back to models and manuals

Manual 73237, revised July 14, 2026: all F3A-xx; F1A Q-6 and earlier; F2A Q-7 and earlier; PTF1A Q-5 only. This is an alternative edition reference for the listed models, not automatic applicability to every unit. | Document: 73237 | Issued: 2019-02-25 | Revised: 2026-07-14

F3A and earlier upright controls use a different edition

The 73237 cover includes all F3A models, F1A through auxiliary Q-6, F2A through Q-7 and PTF1A at Q-5. Keep this edition separate from the later-control guide. Unlisted auxiliary codes and replacement controls need their own match before using a display table.

Steelheart_UR_serv.pdf, page 1

dor, E01 and E02 retain their full spelling

In this service edition, dor refers to the door-switch alarm, E01 to the cabinet thermistor and E02 to the defrost thermistor. Hi and Lo concern temperature. Do not shorten E01 to E1: that would hide a controller-generation difference. Persistent alarms need diagnosis, not a guessed sensor replacement.

Steelheart_UR_serv.pdf, page 45

A defrost display is not proof of a failed heater

The freezer sequence temporarily shows dEF instead of cabinet temperature and includes recovery delays. Persistent evaporator ice can also involve airflow, sensing, controls or refrigerant conditions. Report poor temperature recovery and repeated icing together; do not use refrigerator defrost behavior as the freezer benchmark.

Steelheart_UR_serv.pdf, page 40 Steelheart_UR_serv.pdf, page 44

A dirty filter and a blocked condenser are different items

The 73237 maintenance page calls for air-filter checks at least twice a month and a yearly condenser check, with cleaning according to condition. Wick care is separate again. Unplug and protect products before maintenance, and leave internal access or damaged electrical connections to a qualified technician.

Steelheart_UR_serv.pdf, page 56
FM-23-HC / FM-49-HC glass-door freezer guidance4 topics Back to models and manuals

MAN-337-R and MAN-339-R, revised May 23, 2025; pictured Dixell XR07CH. Covers name FM-23-HC and FM-49-HC only. BLK/WHT product pages link these files, but suffix-specific controller applicability remains unapproved. | Document: MAN-339-R | Issued: 2019-05-31 | Revised: 2025-05-23

Companion instruction manual | Document: MAN-337-R | Issued: 2019-04-25 | Revised: 2025-05-23

A warm display freezer needs more than a setpoint change

Cooling loss can involve a dirty condenser, fan or control trouble, door-switch issues, electrical supply or the refrigeration system. Heavy frost and condensation have separate diagnostic branches. Record the temperature and display before requesting service; lowering the setpoint is not a diagnosis or repair.

FM-23_49-HC_serv.pdf, page 12 FM-23_49-HC_serv.pdf, page 13

Keep Dixell messages distinct from Steelheart codes

For the Dixell control in the FM guide, P1, P2 and P3 are probe-related errors; HA and LA are temperature alarms. H2 and L2 concern condenser temperature, EA and CA external alarms, PA the pressure-switch alarm and dA an open door. Use only the meanings that match the installed control and configured inputs; a code alone does not establish a failed part.

FM-23_49-HC_inst.pdf, page 16 FM-23_49-HC_inst.pdf, page 17

Flashing symbols can mark normal waiting periods

On the pictured FM control, a flashing compressor symbol indicates anti-short-cycle delay, a flashing defrost symbol indicates drip time, and a flashing fan symbol indicates a post-defrost fan delay. These are different from the alarm symbol. Note whether cooling recovers rather than treating every flashing symbol as a fault.

FM-23_49-HC_inst.pdf, page 16

Protect products before cabinet cleaning

Unplug the freezer and move products to suitable cold storage before cleaning the cabinet and shelves with mild soap. Dry the interior and let the cabinet reach its required temperature before reloading. The service edition separately calls for annual condenser inspection and cleaning as needed; electrical repairs are not routine owner maintenance.

FM-23_49-HC_inst.pdf, page 18
KM-81BAK / KM-116BAK / KM-161BAK: cooling and care4 topics Back to models and manuals

K-suffix instruction edition and service manual 73262. Alarm meanings below require control board 2B0161-01; no transfer to older J models. | Document: 73262 | Issued: 2025-10-27

Companion manufacturer manual | Issued: 2025-05-07

No ice does not automatically mean a bad compressor

An empty bin with no new ice can involve interrupted water supply, a clogged external filter, a sticking bin control or a component fault. A full bin can also stop production normally. Tell the technician whether water is available and whether the bin is empty; internal electrical, control and refrigeration checks need service access.

KM-81_116_161B_K_serv.pdf, page 41 KM-81_116_161B_K_serv.pdf, page 42

Record the repeating beep count

With the 2B0161-01 board in this guide, one repeating beep concerns high evaporator temperature, two concern extended harvest and three concern an extended freeze cycle. Six and seven concern low and high supply voltage. A single startup beep is different. Report the pattern without opening the control box or repeatedly resetting protection.

KM-81_116_161B_K_serv.pdf, page 48

Water standing in the bin needs prompt attention

A blocked bin drain can allow water to collect and overflow. If the bin will not drain, turn the appliance off, close its water supply shutoff and request service. Do not keep making ice into standing water or store other products in the ice bin.

KM-81_116_161B_K_inst.pdf, page 26

Keep air and water maintenance separate

Inspect the air filter and clean it when dirty; external water filters, hoses and the condenser are separate maintenance items. This instruction edition lists yearly cleaning and sanitizing of the appliance and bin, with more frequent attention when conditions require it. Refrigeration and internal component work belong to a qualified technician.

KM-81_116_161B_K_inst.pdf, page 29
KM-231BAK / KM-301BAK: stoppages and freeze-up4 topics Back to models and manuals

K-suffix models only; service manual 73263 revised July 9, 2026. Match the installed control to this edition; J-suffix controls and settings remain separate. | Document: 73263 | Issued: 2026-01-14 | Revised: 2026-07-09

Companion manufacturer manual | Issued: 2025-05-08

Separate an empty-bin stoppage from a full-bin stop

The service chart includes water supply and filter restrictions, a bin-control problem, a protective alarm and electrical or refrigeration faults. A full bin is a normal reason to stop. Record the bin condition and any repeating sound before service; do not bypass the bin control to force production.

KM-231_301B_K_serv.pdf, page 41

Freeze-up has several possible causes

Ice accumulating where it should release can involve scale, dirty or displaced water-distribution parts, a sticking float, low water pressure or refrigeration trouble. The service checklist treats these as alternatives to investigate. Do not chip the evaporator or change timer switches to compensate for repeated freeze-up.

KM-231_301B_K_serv.pdf, page 42 KM-231_301B_K_serv.pdf, page 49

Distinguish the startup sound from an alarm

In the documented K control sequence, startup produces a beep. Repeating one-, two- and three-beep alarms instead concern high evaporator temperature, harvest backup timing and freeze timing. Six and seven concern supply voltage. Give the technician the repeat count and operating symptom; the sound alone does not identify a replacement part.

KM-231_301B_K_serv.pdf, page 48

A draining problem is not a cleaning reminder

If water remains in the bin instead of draining, stop the appliance, close its water supply shutoff and call for service. Routine filter inspection and scheduled sanitizing help maintain the machine but do not correct every drain fault. Keep air openings clear and use the maintenance schedule for this K edition.

KM-231_301B_K_inst.pdf, page 24 KM-231_301B_K_inst.pdf, page 27
KM-301BWJ: earlier water-cooled control guidance3 topics Back to models and manuals

J-suffix water-cooled identity, instruction edition April 11, 2019 and service manual 73238 revised May 17, 2023. H P01771-02 and H+ 2B0161-01 are distinct board branches. | Document: 73238 | Issued: 2019-07-23 | Revised: 2023-05-17

Companion manufacturer manual | Issued: 2019-04-11

The installed board selects the operating sequence

The KM-301BWJ service guide has separate H and H+ control-board sections. Their LED layouts and sequence details differ even where an alarm count has the same meaning. Supply the complete model and serial number for service; a later K-suffix guide is not a substitute for identifying this board.

KM-231_301B_J_serv.pdf, page 46 KM-231_301B_J_serv.pdf, page 47

Beep counts describe a condition, not a failed part

Both documented J-board tables associate repeating one, two and three beeps with high evaporator temperature, harvest backup timing and freeze timing. Six and seven concern supply voltage. A startup beep is not that repeating alarm. Leave internal diagnosis and reset decisions to the technician, especially if the shutdown returns.

KM-231_301B_J_serv.pdf, page 46 KM-231_301B_J_serv.pdf, page 47

Use the J maintenance schedule for this water-cooled model

Keep the scoop clean and arrange the listed checks of water filters, the inlet screen, hoses and condenser. The manual calls for yearly machine and bin cleaning and sanitizing, adjusted for site conditions. Its family table also lists air filters; applicability depends on the actual equipment, not every item on a shared table.

KM-231_301B_J_inst.pdf, page 21
KM-1301 / 1601 / 1900 / 2200 / 2600: bin control and care3 topics Back to models and manuals

Instruction edition revised June 19, 2025, listed J/Z/3 identities only. This instruction reference does not assign service alarms or resolve the Q2-and-later service-manual boundary. | Issued: 2023-08-29 | Revised: 2025-06-19

An apparently full bin can stop an empty machine

This instruction edition uses an ultrasonic bin control. An obstruction in its sensing area or interference from a top kit can affect operation. If the machine stops while the bin is not full, report that mismatch for service. Do not raise the ice-level setting or defeat the sensor to force more ice.

KM-1301_1601_1900_2200_2600S_J(Z)(3)_inst.pdf, page 40 KM-1301_1601_1900_2200_2600S_J(Z)(3)_inst.pdf, page 43

Shutdown timing depends on the active cycle

The documented bin-control response differs between fill, harvest and freeze. A machine may finish the relevant cycle before stopping, so an observed delay is not by itself proof of a bad sensor. Continued overfilling or leakage needs service; do not perform the internal control test or adjust switches yourself.

KM-1301_1601_1900_2200_2600S_J(Z)(3)_inst.pdf, page 44

Include the bin-control lens in planned maintenance

The maintenance table includes monthly lens care and cleaning of the underside, top kits and bin-contact areas, alongside water-filter checks. It separately lists yearly machine and bin sanitizing and condenser inspection. Arrange safe access and power isolation for maintenance, and adjust the schedule to actual water and site conditions.

KM-1301_1601_1900_2200_2600S_J(Z)(3)_inst.pdf, page 46
F-1530 K2 / KZ2 flake and cubelet alarms4 topics Back to models and manuals

Instruction edition revised August 4, 2026. Retain K2/KZ2 and -C/-SC suffixes: the cubelet-only branches do not apply to unsuffixed flakers. F-2030 identities are not added by this shared cover. | Issued: 2026-06-02 | Revised: 2026-08-04

Low water and a drain-mode alarm are different

In this F-1530 table, one beep in each repeating group signals low-water protection; two indicate that the control has remained in DRAIN too long. Record the count and whether the water supply was interrupted. If the condition returns after normal operation is restored, arrange service instead of bypassing protection.

F-1530_2030M_K(Z)2(3)(-C)(-SC)_inst.pdf, page 45

Repeated pressure trips require the machine to stay off

Three beeps concern the earlier high-pressure trips; four concern the third trip within an hour. The four-beep instruction is to turn power off and call for service, leaving the machine off until resolved. Five beeps concern freeze timing, while six and seven concern supply voltage. None alone proves a compressor failure.

F-1530_2030M_K(Z)2(3)(-C)(-SC)_inst.pdf, page 45

Eight, nine and ten depend on the equipment branch

Eight beeps can concern the gear-motor fuse or protector, with an additional thermistor branch for cubelet versions. Nine concern the mechanical backup bin-control circuit on modular units. Ten concern a cubelet thermistor condition and are not a base-flaker diagnosis. Preserve the full suffix when requesting service; do not reset repeatedly or change dip switches.

F-1530_2030M_K(Z)2(3)(-C)(-SC)_inst.pdf, page 45

Scale removal and mechanical inspection are separate jobs

This edition lists six-month cleaning and sanitizing of the machine and bin, plus drain-pan and drain checks. Bearing, seal and auger inspections are separate service tasks, not part of wiping the cabinet. Arrange maintenance for the actual water quality and workload, with qualified handling of internal parts.

F-1530_2030M_K(Z)2(3)(-C)(-SC)_inst.pdf, page 47
DCM-300 / 500 / 700 K: dispenser alarms and care3 topics Back to models and manuals

Instruction edition revised August 25, 2025, listed K and -OS identities. DCM-271 and DCM-751 are separate. The shared table excludes DCM from its nine- and ten-beep branches. | Issued: 2025-03-05 | Revised: 2025-08-25

Record the alarm light and repeating sound

With the orange ALARM light on, one beep concerns low water, two prolonged DRAIN mode, and five freeze timing. Six and seven concern supply voltage. Tell the technician the repeating count and whether ice production or dispensing stopped; do not infer a failed part from the sound alone.

DCM-300_500_700B_K(-OS)_inst.pdf, page 29

Four pressure-alarm beeps are a stop condition

Four beeps mark repeated high-pressure trips. Turn power off and leave the machine off for service. Do not keep restarting it. The table also contains non-DCM branches, so a code list copied from a modular flaker can be misleading here.

DCM-300_500_700B_K(-OS)_inst.pdf, page 29

Owner cleaning is separate from internal maintenance

The user schedule covers air-filter inspection and exterior cleaning. The service schedule assigns internal sanitizing, drain checks and mechanical inspections to qualified technicians. Plan the listed six-month machine and bin sanitation around water quality and site conditions; wiping the dispenser exterior does not replace it.

DCM-300_500_700B_K(-OS)_inst.pdf, page 31
C-80BAK variants: drainage and cubelet care6 topics Back to models and manuals

C-80 instruction edition revised February 21, 2025. HS-5061 advice applies only when that optional pump is actually fitted. Do not substitute AM-50 maintenance intervals. | Issued: 2024-10-23 | Revised: 2025-02-21

Service supplement: manual 73258 revised August 7, 2026, four listed C-80BAK variants and pictured 2B0595-02 thermistor board. C-80 relay/LED behavior is not a modular KM beep-code table. | Document: 73258 | Issued: 2025-04-22 | Revised: 2026-08-07

Standing water can indicate a blocked drain or pump trouble

If water collects in the ice bin and will not drain, turn the machine off, close its water supply shutoff and request service. A clogged drain and a malfunctioning optional pump are different possibilities. Report whether the machine has an HS-5061 pump instead of assuming every C-80 has one.

C-80BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 33 C-80BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 36

The optional pump can remain powered when ice making is off

With an HS-5061 fitted, the control switch OFF position does not remove power from the pump. Its safety checks belong in the maintenance plan. Do not open electrical parts or restrict the discharge hose as an improvised test; have a technician investigate overflow or a pump that will not stop.

C-80BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 36

Cubelet care includes more than the storage bin

The C-80 schedule separates three-month bin-drain maintenance, six-month cleaning and sanitizing, and yearly condenser inspection. It also contains bearing, seal and auger service requirements. Keep those mechanical inspections with qualified service personnel; a clean-looking bin does not establish the condition of the ice-making mechanism.

C-80BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 38

The optional drain pump can interrupt production

The C-80 no-production chart includes an open optional pump safety switch, a blocked or kinked hose and pump faults, alongside water supply, bin sensing and other causes. Report standing water and whether an HS-5061 is fitted. Do not bypass its safety circuit to restart the machine.

C-80BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 32

Refill trouble and gear-motor trouble are different

The diagnostic chart separates water refill problems from faults involving the gear motor, bearings or auger drive. Repeated stops during refill may involve a sticking float, inlet restriction or water-control components. Internal mechanical and electrical checks require a technician; noise or a stoppage alone does not identify the gear motor as the failed part.

C-80BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 32 C-80BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 33

The C-80 board lights indicate power and ice-making demand

On the pictured thermistor board, LED 1 is a steady power indication and LED 2 follows the ice-making relay condition. These are internal operating indicators, not a customer error-code display. Do not open the cabinet to inspect them or interpret normal relay behavior using a modular KM alarm list.

C-80BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 34 C-80BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 35
AM-50BAK variants: bin drainage and maintenance6 topics Back to models and manuals

AM-50 instruction edition revised February 10, 2025. Preserve DS/AD/ADDS identities. HS-5061 is optional, and its inspection interval is inconsistent between the operating section and maintenance table. | Issued: 2024-12-13 | Revised: 2025-02-10

Service supplement: manual 73257 revised February 24, 2026, four listed AM-50BAK variants. Main-board and thermistor-board indicators have different meanings; previous optional-pump interval conflict remains unresolved. | Document: 73257 | Issued: 2025-05-23 | Revised: 2026-02-24

Stop production if the bin will not drain

Water backing up can overflow the bin. Turn the appliance off, close the water supply shutoff and request service when water will not drain. Tell the technician whether the optional HS-5061 pump is fitted; a drain obstruction and pump trouble are not the same diagnosis.

AM-50BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 33 AM-50BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 36

Do not treat OFF as pump isolation

The optional HS-5061 remains powered with the control switch off. Its operating section and maintenance table give different testing intervals. Have the technician resolve the schedule for the fitted pump and leave discharge-restriction tests to service personnel.

AM-50BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 36 AM-50BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 37

Use the AM schedule, not the C-80 schedule

This AM-50 edition lists three-month bin-drain care and yearly machine and bin cleaning and sanitizing, with more frequent maintenance as conditions require. Water filters, hoses and the condenser have separate checks. Similar cabinet styling does not make the C-80 cubelet schedule interchangeable.

AM-50BAK(-DS)(-AD)(-ADDS)_inst.pdf, page 37

A flashing main-board light can be normal

The AM-50 service guide describes a flashing main-board LED 1 as an indication of the expected control supply. Its thermistor-board LED 1 instead stays steady. The same LED number therefore does not mean the same thing on both boards. These are service observations, not a reason for an owner to open the control enclosure.

AM-50BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 36

An idle AM-50 may be stopped by drainage protection

Possible causes in the no-production chart include water supply or filter trouble, optional pump protection, bin sensing and component faults. Tell the technician whether the bin contains ice or standing water and whether a drain pump is installed. Never bypass the pump safety or bin control to force ice making.

AM-50BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 37

Slow production and freeze-up require different observations

Long harvest, long freeze and ice buildup have separate diagnostic branches. They can involve scale, water-distribution problems, sensors, valves, heat rejection or refrigeration faults. Record whether ice forms but fails to release, or whether very little forms. Do not adjust harvest controls to compensate for a symptom; this edition explicitly warns against that adjustment.

AM-50BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 38 AM-50BAK(-DS)(-AD)(-ADDS)_serv.pdf, page 39
KM-322 / 330 / 522 / 530 / 622 / 730 / 1130 K: production and alarms5 topics Back to models and manuals

Service manual 73269 revised September 9, 2026, pictured 2A9678-03 board. Exact listed MAK/MAK2 identities only; no KM-830 or earlier J control substitution. | Document: 73269 | Issued: 2025-12-15 | Revised: 2026-09-09

An empty bin does not isolate the cause of a stoppage

The service chart separates a normal full-bin stop from restricted water supply, a dirty ultrasonic sensor lens, float or valve trouble, an alarm and electrical faults. Report whether the bin is empty, whether water supply changed and whether the machine had been cleaned recently. These observations help diagnosis without requiring access to live controls.

KM-x22_xx30MAK(2)_serv.pdf, page 54

Capture the repeating alarm pattern

For the documented 2A9678-03 board, repeating one, two and three beeps refer to high evaporator temperature, harvest backup timing and freeze timing. Six and seven concern low and high voltage. A startup beep is separate. Report the pattern and leave internal testing and reset decisions to qualified service personnel.

KM-x22_xx30MAK(2)_serv.pdf, page 60 KM-x22_xx30MAK(2)_serv.pdf, page 61

A blinking POWER light can record freeze-up detection

This edition distinguishes a blinking POWER indicator associated with freeze-up detection from the audible alarms. The indication can remain during subsequent operation. Do not clear it simply to make the light look normal; tell the technician about the indication and any poor ice release, so the cause can be investigated.

KM-x22_xx30MAK(2)_serv.pdf, page 61

Bin sensing and water filtration need their own care

The user-maintenance table includes air-filter inspection, monthly water-filter checks and bin-control lens care. A clean exterior does not establish that the sensing area or water supply is clear. Arrange safe access for the documented maintenance and do not reposition the sensor to compensate for repeated stops.

KM-x22_xx30MAK(2)_serv.pdf, page 54 KM-x22_xx30MAK(2)_serv.pdf, page 75

Schedule internal sanitation separately

The service-maintenance table lists yearly machine and bin cleaning and sanitizing, inlet-screen cleaning, hose inspection and condenser inspection. Actual conditions can require more frequent attention. Internal service requires power isolation and qualified handling; routine scoop cleaning is not a substitute for the internal sanitation program.

KM-x22_xx30MAK(2)_serv.pdf, page 75 KM-x22_xx30MAK(2)_serv.pdf, page 76
KM-830MAK2: alarms, fan operation and care4 topics Back to models and manuals

Service manual 73276 revised August 27, 2026, KM-830MAK2 cover and pictured 2A9678-03 control. The broader filename is not evidence for additional model variants. | Document: 73276 | Issued: 2026-04-01 | Revised: 2026-08-27

No ice and a running fan can occur together

This edition states that the fan motor is energized whenever appliance power is supplied. A running fan therefore does not prove that the compressor or ice-making cycle is working. The no-production chart separately considers bin sensing, water supply, controls and electrical or refrigeration faults. Describe both fan operation and the actual ice output when requesting service.

KM-830M_K(Z)2_serv.pdf, page 40 KM-830M_K(Z)2_serv.pdf, page 47

Record sound and light indications separately

With the documented board, one repeating beep concerns high evaporator temperature, two harvest backup timing and three freeze timing; six and seven concern voltage. A blinking POWER light has a separate freeze-up detection meaning. Do not combine the light and sound into a guessed code or repeatedly reset a recurring shutdown.

KM-830M_K(Z)2_serv.pdf, page 46 KM-830M_K(Z)2_serv.pdf, page 47

A full-bin signal is not proof of a failed board

The service table associates the orange BIN CLS indication with a full bin. An empty-bin stoppage can also involve bin-control movement, water supply or other faults. Have the technician match the actual sensor and control arrangement before interpreting an internal light; do not open the control box just to inspect it.

KM-830M_K(Z)2_serv.pdf, page 40

Preserve airflow without treating cleaning as repair

Keep up with air-filter inspection and external water-filter checks. The KM-830 schedule separately lists yearly machine and bin sanitation, hose checks and condenser inspection, with frequency adjusted to conditions. Continued low production after routine care still needs diagnosis; disconnecting power for internal service is distinct from stopping the ice cycle.

KM-830M_K(Z)2_serv.pdf, page 61
KM-901 / 1100 / 1340 / 1601 MRJZ: controller generations5 topics Back to models and manuals

Service manual 73213 revised March 20, 2026. For KM-901/1100 the earlier branch is P-2 and earlier, later P-3 and later; for KM-1340/1601 it is N-3 and earlier versus P-0 and later. Auxiliary codes are not automatically converted to serial dates; replacement controls require identification. | Document: 73213 | Issued: 2018-01-30 | Revised: 2026-03-20

Provide the auxiliary code as well as the model

The 2026 service edition divides the remote J/Z models into different control generations. A serial or model label alone is not a reason to borrow a different board diagram. Supply a data-plate photo and mention any known control replacement; the technician must identify the installed board before selecting its sequence or settings.

Large_Modular_KM_J_Series_serv.pdf, page 69 Large_Modular_KM_J_Series_serv.pdf, page 70

A stopped machine can be responding to bin sensing

The diagnostic chart includes thermostatic, mechanical and ultrasonic bin-control branches. It also lists interrupted water supply, clogged external filters and component faults. Record whether the bin is actually full. Do not assume that every MRJZ unit has the same sensor or that an empty-bin stop means the compressor has failed.

Large_Modular_KM_J_Series_serv.pdf, page 61

Keep recurring beeps distinct from the startup sound

Across the two documented alarm tables, repeating one, two and three beeps concern high evaporator temperature, extended harvest and extended freeze. Six and seven concern supply voltage. The matching board still matters for the diagnostic path. Report the repeat count and symptoms without changing switches or clearing a recurring alarm yourself.

Large_Modular_KM_J_Series_serv.pdf, page 71 Large_Modular_KM_J_Series_serv.pdf, page 72

Two flashing-light behaviors belong to different boards

On 2A7664-02, the manual describes freeze-time correction with POWER OK blinking and a further EXT HARVEST indication after repeated corrections. On 2A9678-02, blinking POWER instead identifies the documented freeze-up detection condition. Neither description automatically applies to every board in its generation. Preserve the exact board and light labels for service.

Large_Modular_KM_J_Series_serv.pdf, page 71 Large_Modular_KM_J_Series_serv.pdf, page 72

Use the maintenance items that match the fitted equipment

The shared schedule covers water filters, bin-contact areas, sanitation, hoses and condenser inspection. Sensor-lens and air-filter entries depend on the actual configuration. Arrange appropriate access for remote equipment and power isolation before service; the presence of a shared maintenance table does not authorize climbing to or opening a remote condenser.

Large_Modular_KM_J_Series_serv.pdf, page 85
KMD-505MWJ / MRJZ and KMD-705MRJZ: stoppages and care5 topics Back to models and manuals

Service manual 73252 revised April 9, 2025; instruction edition July 15, 2024. Boards 2A9678-01 and -02 are distinct. Freeze-up detection below applies only to -02. Other identities on the shared cover are not added. | Document: 73252 | Issued: 2024-04-30 | Revised: 2025-04-09

Companion manufacturer operating and maintenance instructions | Issued: 2024-07-15

An empty bin and no new ice

Loss of water, a restricted external filter or a dirty ultrasonic bin-control lens can stop production. A full bin is a normal stop condition; an empty bin with the same stoppage needs investigation. Note the bin level, recent water interruptions and any repeating sound for service. Do not bypass the sensor or open the control box.

KMD_355_505_705M_J(Z)_serv.pdf, page 37

Ice builds up instead of releasing

Scale, displaced cube guides, restricted water distribution and a sticking float are among the possible freeze-up causes in this guide. Refrigeration faults are also possible, so cleaning alone is not a confirmed repair. Report when the buildup started and the last cleaning date; leave internal inspection and timer adjustments to a technician.

KMD_355_505_705M_J(Z)_serv.pdf, page 38 KMD_355_505_705M_J(Z)_serv.pdf, page 41

Count repeating beeps separately from startup

The documented control sounds once at startup. Repeating one-, two- and three-beep groups concern high evaporator temperature, an extended harvest and an extended freeze, respectively. Six and seven concern low and high control supply voltage. Share the repeating count with the technician; do not repeatedly reset a shutdown or select a replacement part from the count alone.

KMD_355_505_705M_J(Z)_serv.pdf, page 43 KMD_355_505_705M_J(Z)_serv.pdf, page 44

A flashing POWER light depends on the board

For board 2A9678-02, a blinking red POWER light indicates the freeze-up detection cycle. This is a light-only indication, separate from the audible alarms. The same interpretation is not assigned to the 2A9678-01 board. Have the technician identify the installed control and investigate recurring freeze-up; do not remove panels to look for the light.

KMD_355_505_705M_J(Z)_serv.pdf, page 24 KMD_355_505_705M_J(Z)_serv.pdf, page 43 KMD_355_505_705M_J(Z)_serv.pdf, page 44

Plan lens care as well as sanitizing

The maintenance schedule includes monthly bin-control lens care and external water-filter checks. Yearly machine and bin or dispenser cleaning and sanitizing are separate tasks, with more frequent attention when conditions require it. Include the underside and top-kit contact areas in the service plan, and have the technician match condenser maintenance to the water-cooled or remote version.

KMD_355_505_705M_J(Z)_inst.pdf, page 44
KMD-860MWJ: bin control, alarms and water-cooled care4 topics Back to models and manuals

Water-cooled MWJ identity only. Service manual 73221 revised July 7, 2021 documents the 2A7664-02 J board; instruction edition January 16, 2018. No MRJZ or 2A9678 control inference. | Document: 73221 | Issued: 2018-01-30 | Revised: 2021-07-07

Companion manufacturer operating and maintenance instructions | Issued: 2018-01-16

A stuck bin paddle can interrupt production

This guide describes a lever-operated bin control, not the ultrasonic lens used on newer KMD families. A restricted actuator, interrupted water supply or a clogged external filter can accompany a no-ice complaint. Record whether the bin is full and whether the stoppage followed cleaning. Leave paddle, wiring and control tests to service personnel; never hold the control out of the way to force production.

KMD-860M_J_serv.pdf, page 27 KMD-860M_J_serv.pdf, page 32

Report the sound pattern before service

For the documented J control, a startup beep is normal. Repeated one-, two- or three-beep groups refer to evaporator temperature, harvest timing or freeze timing; six and seven refer to supply-voltage protection. These conditions have several possible causes. Tell the technician which pattern returns and whether ice production stopped, without attempting an internal reset.

KMD-860M_J_serv.pdf, page 38 KMD-860M_J_serv.pdf, page 39

POWER OK flashing is a different control function

On the 2A7664-02 board, a flashing red POWER OK indicator is associated with freeze-time correction. It is not the 2A9678-02 freeze-up detection indication described for KMD-505/705 models. A technician should verify the installed board and investigate the operating history; a flashing light alone does not establish that the board has failed.

KMD-860M_J_serv.pdf, page 38 KMD-860M_J_serv.pdf, page 39

The condenser has its own water circuit

The KMD-860MWJ diagrams separate condenser cooling water from ice-making water and the bin drain. A water concern should be traced to the actual circuit, not treated as an air-filter problem. The care schedule separately lists external filters, hoses, the inlet screen, condenser inspection and yearly machine and bin sanitizing. Leave water-regulating valve adjustment to a qualified technician.

KMD-860M_J_inst.pdf, page 17 KMD-860M_J_inst.pdf, page 29
KMD-860MRJZ: restart and cleaning precautions3 topics Back to models and manuals

MRJZ cover identity in the November 15, 2021 instruction edition only. This operating-care section supplies no service alarm meanings; the non-Z KMD-860 service manual is not substituted. | Issued: 2021-11-15

After a power interruption, avoid rapid restarts

The remote-model instructions require at least four hours of power before startup and warn against restarting within three minutes of a stop. Tell the service technician whether power was disconnected and for how long. Do not repeatedly cycle the machine to overcome a fault; have the restart conditions checked without opening panels yourself.

KMD-860M_J(Z)_inst.pdf, page 27

A stoppage after cleaning needs the operating setup checked

This instruction edition states that the compressor cannot run unless the cleaning valve is fully closed. If production did not resume after cleaning, give that history to the technician. It does not prove the compressor failed. Leave valve and switch checks to service personnel; do not run the machine in WASH with an empty tank.

KMD-860M_J(Z)_inst.pdf, page 27 KMD-860M_J(Z)_inst.pdf, page 29

Include the remote equipment in scheduled care

Arrange at least yearly cleaning and sanitizing of the machine and its bin or dispenser, more often when water conditions require it. The schedule also calls for condenser inspection, water-hose checks and inlet-screen cleaning. Give the technician the MRJZ suffix and remote-unit details so the service plan follows this equipment, not a water-cooled KMD-860 configuration.

KMD-860M_J(Z)_inst.pdf, page 28 KMD-860M_J(Z)_inst.pdf, page 29
KMS-2000MLJ: production stops and remote-unit care4 topics Back to models and manuals

KMS-2000MLJ with SRK-20J/3 context; service manual 73225 revised July 17, 2024 and instructions revised October 31, 2024. The layout identifies 2A7664-04, but other sections retain conflicting bin-control and correction references. No controller replacement or serial cutoff is inferred. | Document: 73225 | Issued: 2018-06-15 | Revised: 2024-07-17

Companion manufacturer operating and maintenance instructions | Issued: 2018-01-23 | Revised: 2024-10-31

No ice can originate at either part of the system

Interrupted water, a restricted filter or a remote condenser problem can stop the KMS head. A dirty condenser or failed remote fan can trigger protection at the SRK unit. Give service both nameplate identities and the timing of the stoppage; refrigerant, electrical and remote-unit access checks belong to a technician.

KMS-2000MLJ_serv.pdf, page 30 KMS-2000MLJ_serv.pdf, page 31

A full-bin stop is not the same as a failed machine

The dedicated bin-control section describes a lever-actuated proximity switch. A restricted paddle can interfere with ice-level sensing. Report whether the bin was full or empty when production stopped and whether cleaning preceded the problem. Do not bypass the control or change its position to keep making ice.

KMS-2000MLJ_serv.pdf, page 24

Distinguish a startup sound from a repeating alarm

A single startup beep is expected. Repeating groups of one, two or three indicate excessive evaporator temperature, harvest timeout or freeze timeout; six and seven concern low or high control supply voltage. Record the returning pattern for service. It identifies a protection condition, not a failed part, and repeated resets are not a repair.

KMS-2000MLJ_serv.pdf, page 37

The remote condenser belongs in the maintenance plan

The schedule separates daily scoop care, monthly external-filter checks and yearly machine and bin cleaning and sanitizing. It also includes the condenser, inlet screen and water hoses. Arrange more frequent service when water quality or the operating environment warrants it; cleaning the visible head alone does not cover the remote equipment.

KMS-2000MLJ_inst.pdf, page 31
KMS-1402MLJ: bin sensing, alarms and sanitation4 topics Back to models and manuals

KMS-1402MLJ with SRK-15J/3 context only. Service manual 73224 revised November 4, 2020 identifies the 2A7664-02 J board; instructions revised November 13, 2024. Confirm the installed control before interpreting its indicators. | Document: 73224 | Issued: 2018-05-16 | Revised: 2020-11-04

Companion manufacturer operating and maintenance instructions | Issued: 2018-01-22 | Revised: 2024-11-13

Production stops while space remains in the bin

The documented bin sensor uses a paddle and proximity switch. Restricted paddle movement is one possible cause of a stop, alongside interrupted water, filter restriction and remote-unit faults. Note the ice level and recent cleaning history. A technician should check the sensor and system; do not hold the paddle clear or bypass it.

KMS-1402MLJ_serv.pdf, page 26 KMS-1402MLJ_serv.pdf, page 32

A repeating alarm is different from correction lights

One-, two- and three-beep groups concern high evaporator temperature, harvest timeout and freeze timeout. Six and seven concern control voltage. On the documented 2A7664-02 board, blinking POWER OK means freeze-time correction; EXT HARVEST also blinks after the third correction within 36 hours. Leave panel access and control identification to service personnel.

KMS-1402MLJ_serv.pdf, page 38 KMS-1402MLJ_serv.pdf, page 39

An extended freeze does not prove a refrigerant leak

The freeze alarm can involve a sticking float, water entering when it should not, inadequate pumping or refrigeration faults. The diagnostic table distinguishes fill/refill and harvest water valves. Report whether the unit stopped producing entirely or only slowed down; a technician needs to trace the cycle before recommending parts or refrigerant work.

KMS-1402MLJ_serv.pdf, page 32 KMS-1402MLJ_serv.pdf, page 33 KMS-1402MLJ_serv.pdf, page 39

Include surfaces around the ice path

Along with daily scoop cleaning and monthly filter checks, the care schedule includes the underside, top kits, bin door and snout. Yearly cleaning and sanitizing covers the machine and storage bin or dispenser, with condenser, inlet-screen and hose attention as well. Keep a dated maintenance record and arrange extra service when local conditions require it.

KMS-1402MLJ_inst.pdf, page 31
KMS-1122MLJ: cold-room stops and controller boundaries4 topics Back to models and manuals

KMS-1122MLJ with SRK-12J/3 context. Service manual 73223 revised March 12, 2019 depicts 2A7664-04 but explicitly limits freeze-time correction to 2A7664-02. Instructions revised November 7, 2024. No build-date or serial transition between these controls is established. | Document: 73223 | Issued: 2018-03-21 | Revised: 2019-03-12

Companion manufacturer operating and maintenance instructions | Issued: 2017-11-20 | Revised: 2024-11-07

An empty bin in a cold room can still cause a stop

This manual describes a temperature-sensing bin control. Below 45 F ambient, it can stop production even with an empty bin. Record the room temperature and ice level when the stoppage occurs. Do not adjust the control to force operation: an incorrect setting can prevent a full-bin shutdown and damage the machine.

KMS-1122MLJ_serv.pdf, page 25 KMS-1122MLJ_serv.pdf, page 30

Capture the alarm pattern before requesting service

Repeated one-, two- and three-beep groups identify high evaporator temperature, harvest timeout and freeze timeout; six and seven relate to low and high control voltage. A startup beep alone is normal. Report the sound pattern and recent water or power interruptions without opening the control box or repeatedly resetting the machine.

KMS-1122MLJ_serv.pdf, page 30 KMS-1122MLJ_serv.pdf, page 37

Do not transfer a flashing-light meaning between boards

The freeze-time correction description names 2A7664-02, while the board illustration names 2A7664-04. For the specified -02 control, POWER OK flashes during correction and EXT HARVEST joins it after repeated corrections within 36 hours. That interpretation is not assigned here to -04. Have service identify the installed board first.

KMS-1122MLJ_serv.pdf, page 21 KMS-1122MLJ_serv.pdf, page 36 KMS-1122MLJ_serv.pdf, page 37 KMS-1122MLJ_serv.pdf, page 41

Keep filter care separate from internal sanitizing

Monthly external-filter checks do not replace yearly cleaning and sanitizing of the machine and bin liner or dispenser. The schedule also calls for condenser inspection, inlet-screen cleaning and water-hose attention. Clean the scoop daily, keep service dates available and have internal maintenance performed by qualified personnel, more frequently when conditions require it.

KMS-1122MLJ_with_SRK-12J(3)_inst.pdf, page 28
KMH-2100SWJ3: water-cooled operation and care4 topics Back to models and manuals

Water-cooled SWJ3 only; instruction edition June 8, 2018. Operating care, not service-alarm diagnosis. The cover includes older non-Z remote models but does not establish applicability to SRJZ or SRJZ3. | Issued: 2018-01-09 | Revised: 2018-06-08

A post-cleaning stoppage needs the operating setup checked

The cleaning valve must be fully closed for ice production; otherwise the compressor will not run. If the machine stopped making ice immediately after cleaning, tell the technician that history. Have service check the valve and operating setup rather than assuming the compressor failed.

KMH-2100S_J(3)_inst.pdf, page 32

Identify which water circuit has the problem

This water-cooled model has separate ice-making and condenser-water connections. Give the technician the leak location and whether it appears during ice production. Leave water-regulating valve adjustments to service personnel; a condenser-water concern is not an air-filter diagnosis.

KMH-2100S_J(3)_inst.pdf, page 20

Avoid rapid restart attempts

The instructions require at least three minutes between stopping and restarting. They also warn against prolonged WASH operation with an empty tank. Do not repeatedly cycle the machine to overcome a fault; record any recent shutdown or cleaning and arrange service if production does not resume.

KMH-2100S_J(3)_inst.pdf, page 30

Plan sanitizing and seasonal shutdown separately

Arrange machine and bin cleaning and sanitizing at least yearly, with more frequent attention when conditions require it. Monthly external-filter checks are a separate task. Before extended or freezing-weather storage, have a technician prepare both the ice-making water system and the water-cooled condenser.

KMH-2100S_J(3)_inst.pdf, page 31 KMH-2100S_J(3)_inst.pdf, page 32 KMH-2100S_J(3)_inst.pdf, page 36 KMH-2100S_J(3)_inst.pdf, page 37
F-330BAK and F-330BAK-C: alarms, water supply and care5 topics Back to models and manuals

Service manual 73260 issued August 14, 2025 identifies control 2A9874-03; instructions issued August 19, 2025. Preserve the -C suffix for cubelet-only temperature protections. These R-290 models require personnel trained for flammable-refrigerant service; no serial transition is inferred. | Document: 73260 | Issued: 2025-08-14

Companion manufacturer operating and maintenance instructions | Issued: 2025-08-19

No ice can begin with water or airflow restrictions

Restricted water filters, an interrupted supply, a dirty air filter or condenser, and gear-motor protection are among the documented causes. Note whether the machine never starts or stops after running. Leave electrical, auger and refrigeration checks to service personnel; these symptoms alone do not identify a failed component.

F-330BAK(-C)_serv.pdf, page 38 F-330BAK(-C)_serv.pdf, page 39

One or two beeps do not mean the KMS alarms

On this control, one repeating beep signals low water; two indicate that DRAIN has remained selected for over 15 minutes. Six and seven concern low or high control voltage. Report the count and any water interruption or cleaning history. Do not use KMS or KM alarm meanings for this machine.

F-330BAK(-C)_serv.pdf, page 43

Four beeps require a shutdown and service

Three beeps indicate an initial high-pressure protection event; four mean the third event within an hour. For four beeps, switch the machine off and leave it off for service. Repeated resets can mask the unresolved cause. A technician must determine whether airflow, the fan or another fault is responsible.

F-330BAK(-C)_serv.pdf, page 38 F-330BAK(-C)_serv.pdf, page 43

Eight and ten beeps depend on the suffix

Eight beeps can indicate gear-motor fuse or protector trouble on either model. On F-330BAK-C, eight can also concern low evaporator temperature at startup, and ten indicates repeated excessive cooling. Do not assign those temperature meanings to plain F-330BAK. Switch off and call service for these -C temperature alarms; do not replace fuses yourself.

F-330BAK(-C)_serv.pdf, page 43

Internal cleaning is scheduled every six months

The user schedule includes daily scoop care, air-filter inspection every two weeks and monthly exterior cleaning. The separate service schedule calls for machine and bin cleaning and sanitizing every six months, plus drain and seal-bolt checks. Monthly water-filter attention and yearly condenser and bearing inspections are additional tasks; conditions may require more frequent service.

F-330BAK(-C)_inst.pdf, page 24 F-330BAK(-C)_inst.pdf, page 25
F and FD remote models: N2/N3 control generation4 topics Back to models and manuals

Manual 73253, June 17, 2026 revision: N2/N3 and later auxiliary codes with control 2A9874-01. Match the auxiliary code and installed board before using these alarm meanings. Cubelet temperature protections apply only to -C, -SC and -CB, not plain F-1002MRJZ. No serial transition or older-board equivalence is established. | Document: 73253 | Issued: 2024-05-22 | Revised: 2026-06-17

Companion manufacturer operating and maintenance instructions | Issued: 2018-12-12 | Revised: 2023-10-24

An empty bin does not prove a refrigeration failure

Low water supply, a restricted filter, a sticking float, a leaking drain valve or a bin-control problem can stop production. Record whether the machine never starts or stops during a run. A technician should distinguish water loss and bin sensing from a refrigeration fault before selecting parts.

N2-N3_F_FD_combined_serv_RND_Chute.pdf, page 41

Record the beep count before requesting service

One repeating beep concerns low water; two mean DRAIN has remained selected for more than 15 minutes. Three indicate an initial high-pressure event; four mean the third event within an hour. For four beeps, switch off and leave the machine off for service. Do not repeatedly restart it to clear the warning.

N2-N3_F_FD_combined_serv_RND_Chute.pdf, page 47

Eight, nine and ten beeps have different boundaries

Eight beeps can concern the gear-motor fuse or protector; on the cubelet suffixes it can also indicate low evaporator temperature at startup. Ten is a repeated low-temperature protection for those cubelet models only. Nine concerns the mechanical backup bin control. Leave eight- or ten-beep temperature faults off for service, and do not bypass bin protection or replace fuses yourself.

N2-N3_F_FD_combined_serv_RND_Chute.pdf, page 47

Clean the bin-sensor area as well as the ice path

Monthly service includes the bin-control sensing surface and exposed bin-entry areas. Machine and bin cleaning and sanitizing are scheduled every six months, together with drain and seal-bolt inspections. Annual mechanical inspections remain separate; apparent low production should not be addressed by changing control settings instead of maintaining the machine.

Flaker_inst.pdf, page 44
F and FD J models: round-chute service generation3 topics Back to models and manuals

Manual 73204, November 27, 2023 revision, round-chute generation. Board variants 2A4296-01, 2A8054-01 and 2A9093-01 and auxiliary-code/bin-control differences must be matched. MWJ water-cooled and MLJ low-side configurations remain distinct; the later N2/N3 temperature-alarm table is not substituted. | Document: 73204 | Issued: 2014-07-23 | Revised: 2023-11-27

Companion manufacturer operating and maintenance instructions | Issued: 2018-12-12 | Revised: 2023-10-24

Water supply and bin sensing can interrupt a run

A water restriction, a sticking float or water escaping through the drain can interrupt ice production even when the bin is empty. The service checks also include the bin sensor and backup mechanism where fitted. For MWJ water-cooled machines, condenser-water conditions are a separate diagnostic branch; do not apply that branch to MLJ low-side equipment.

F_FD_combined_serv_RND_Chute.pdf, page 37 F_FD_combined_serv_RND_Chute.pdf, page 43

Use the older control alarm meanings

For the matching control, one beep is low water and two indicate an extended DRAIN selection. Four beeps mark repeated high-pressure protection and require leaving the machine off for service. Eight concerns the gear motor. Bin-related alarm interpretation depends on the installed control arrangement; the later cubelet ten-beep protection is not established by this edition.

F_FD_combined_serv_RND_Chute.pdf, page 42 F_FD_combined_serv_RND_Chute.pdf, page 43

Six-month cleaning is not the whole maintenance schedule

Arrange cleaning and sanitizing of the machine and bin every six months, with drain and seal inspections at the same visit. Monthly attention includes the water filter and bin-control lens. Bearings, hoses and other wear items have separate annual checks; tell service about unusual mechanical noise rather than treating it as a cleaning reminder.

Flaker_inst.pdf, page 44
F-422/622/822/1022 MAK variants: water, alarms and care3 topics Back to models and manuals

Manual 73264, September 4, 2026 revision, control 2A9874-03; companion instruction URL retains uppercase Combined. Match the installed controller. Cubelet-only eight/ten temperature meanings do not apply to plain F-422MAK. MAK-CB is excluded from this service guidance. | Document: 73264 | Issued: 2026-01-02 | Revised: 2026-09-04

Companion manufacturer operating and maintenance instructions | Issued: 2025-08-21 | Revised: 2026-09-22

A production stop may originate in the water or bin controls

The documented checks include supply restrictions, float operation, drain-valve leakage, condenser airflow and the ultrasonic primary bin control with its mechanical backup. Report whether water is present and whether the stop follows a full-bin condition. Leave sensor alignment, electrical tests and internal valve checks to a technician.

Mid-Flaker_combined_serv.pdf, page 52

Keep temperature alarms limited to the cubelet suffix

Four beeps indicate repeated high-pressure protection: switch off and call service. Eight can concern the gear-motor fuse or protector on these models; only -C models also have the low-temperature startup meaning. Ten is the repeated low-temperature alarm for those cubelet models. Do not apply those temperature meanings to F-422MAK or attempt repeated resets.

Mid-Flaker_combined_serv.pdf, page 58

Separate routine filter care from internal service

Inspect the air filter every two weeks and clean the exterior monthly. The technician schedule adds monthly water-filter and bin-sensor attention, six-month machine/bin sanitizing and drain inspections, and yearly condenser and bearing checks. A clean cabinet exterior does not establish that the water circuit or ice path is clean.

Mid-Flaker_Combined_inst.pdf, page 52 Mid-Flaker_Combined_inst.pdf, page 53
F-822MAK and F-1022MAK: flake-ice controls and maintenance3 topics Back to models and manuals

Plain MAK flake models, manual 73264 revised September 4, 2026 and control 2A9874-03. The manufacturer instruction association uses lowercase combined; it is retained. Cubelet-only temperature protections are not assigned to these identities. | Document: 73264 | Issued: 2026-01-02 | Revised: 2026-09-04

Companion manufacturer operating and maintenance instructions | Issued: 2025-08-21 | Revised: 2026-09-22

No ice may be a fill or bin-sensing problem

A blocked water filter, a valve that does not admit water, a float problem or a leaking drain can prevent normal production. The ultrasonic and mechanical bin controls also need to be distinguished from a refrigeration failure. Give service the sequence of events, including whether the bin had recently filled or the water supply was interrupted.

Mid-Flaker_combined_serv.pdf, page 52

The flake-model beep count is not a cubelet diagnosis

One beep signals low water, two an extended DRAIN selection, and eight a gear-motor fuse or protector concern. Four beeps require shutting down for service after repeated high-pressure events. These plain MAK models do not inherit the cubelet eight-beep startup-temperature or ten-beep overcooling meanings. Do not change fuses or controller settings to silence an alarm.

Mid-Flaker_combined_serv.pdf, page 58

Keep the sensing surface and drains on the service schedule

Monthly service includes the bin-control sensing surface and external water-filter checks. Every six months, arrange ice-machine and bin cleaning and sanitizing plus drain inspections. Air-filter care every two weeks remains a separate routine task; a persistent production complaint needs diagnosis even when the filter has just been cleaned.

Mid-Flaker_combined_inst.pdf, page 52 Mid-Flaker_combined_inst.pdf, page 53
F-1022MAK-CB: confirmed operating care2 topics Back to models and manuals

Operating-care only, instruction edition September 22, 2026 explicitly including MAK-CB. Service manual 73264 does not explicitly name MAK-CB on its cover, so its alarm meanings are withheld pending applicability confirmation. | Issued: 2025-08-21 | Revised: 2026-09-22

Maintain the air filter and exterior between service visits

The owner schedule calls for an air-filter check every two weeks and monthly exterior cleaning, alongside daily scoop care. Restricted airflow deserves attention, but cleaning a filter is not proof that a stopped machine has no other fault. Report continuing production problems with the complete MAK-CB model suffix.

Mid-Flaker_Combined_inst.pdf, page 52

Schedule six-month internal cleaning and annual wear checks

Have the ice machine and bin cleaned and sanitized every six months, with the drains and seal bolts inspected by service personnel. Monthly water-filter and bin-sensor maintenance and annual condenser and bearing inspections are separate requirements. This operating schedule does not establish a service-alarm map for the -CB controller.

Mid-Flaker_Combined_inst.pdf, page 53
F-2001MRJZ variants: remote-model operating care3 topics Back to models and manuals

Instruction edition September 6, 2023. Care only for the exact MRJZ, MRJZ-C and MRJZ3 identities; a matching service source has not been established. No non-Z service manual, voltage equivalence or generic instruction alarm table is substituted. | Issued: 2019-05-06 | Revised: 2023-09-06

Do not overlook the bin-control lens

Monthly maintenance includes the bin-control lens, external water filters and exposed surfaces around the bin entrance. A dirty sensing area can complicate an apparent full-bin complaint. Keep cleaning within the manufacturer instructions and have a technician investigate a stop that continues after routine maintenance.

F-1501_2001M_J(Z)(3)(-C)(-SC)_inst.pdf, page 43

Include drains in the six-month cleaning visit

Machine and bin cleaning and sanitizing are scheduled every six months. The same service interval includes drain pans, drain lines and seal-bolt inspections. Water collecting beneath the equipment should be reported with its location and timing; it is not a reason to skip or shorten the cleaning cycle.

F-1501_2001M_J(Z)(3)(-C)(-SC)_inst.pdf, page 43

Mechanical wear has its own inspection interval

The yearly schedule includes water-system components and the upper bearing. After three years, annual attention also extends to the lower bearing, mechanical seal and auger. Give service the machine age and any change in sound or leakage; do not wait for a production shutdown or attempt internal auger work yourself.

F-1501_2001M_J(Z)(3)(-C)(-SC)_inst.pdf, page 43
F-2001MWJ: water-cooled round-chute service3 topics Back to models and manuals

Manual 73204 revised November 27, 2023; water-cooled non-Z F-2001MWJ. The manual distinguishes H-1(L) and earlier from H-1(M) and later bin-control arrangements. Match auxiliary code and installed board; later instruction temperature alarms do not override this service edition. | Document: 73204 | Issued: 2014-07-23 | Revised: 2023-11-27

Companion manufacturer operating and maintenance instructions | Issued: 2019-05-06 | Revised: 2023-09-06

Distinguish ice-making water from condenser water

Restricted ice-making water, a sticking float and drain-valve leakage can interrupt a cycle. On this water-cooled model, condenser-water pressure and temperature are additional service checks. Report which connection is leaking and when production stops; an air-cooled fan diagnosis is not interchangeable with these water-circuit checks.

F_FD_combined_serv_RND_Chute.pdf, page 37

A pressure alarm needs its cause resolved

Three beeps identify an initial high-pressure event; four mean repeated events and require leaving the machine off for service. Eight concerns the gear motor in this service edition. Bin-related alarm interpretation must follow the auxiliary-code arrangement, not an assumed universal nine-beep rule or a newer cubelet temperature table.

F_FD_combined_serv_RND_Chute.pdf, page 42 F_FD_combined_serv_RND_Chute.pdf, page 43

Water-cooled equipment still needs scheduled internal care

Arrange machine/bin cleaning and sanitizing and drain inspections every six months. Monthly water-filter and bin-lens attention and yearly bearing, hose and valve inspections remain separate. Have service use the maintenance procedure appropriate to the water-cooled condenser rather than applying an air-cooled brush-and-vacuum routine.

F-1501_2001M_J(Z)(3)(-C)(-SC)_inst.pdf, page 43
F-2001MLJ: square-chute low-side service3 topics Back to models and manuals

Low-side F-2001MLJ, square-chute manual 73243 revised May 15, 2020. This is not the round-chute or remote Z service family; the installed low-side refrigeration arrangement must be identified. | Document: 73243 | Issued: 2019-08-23 | Revised: 2020-05-15

Companion manufacturer operating and maintenance instructions | Issued: 2019-05-06 | Revised: 2023-09-06

A low-side machine needs both water and system checks

A restricted water supply, float trouble, drain leakage or a bin-control stop can explain no production. The technician also needs the connected refrigeration-system details for this low-side model. Do not infer a local condenser fan or water-regulating valve failure from troubleshooting for other models printed in the same manual.

F-1501_2001M_J(_C)_serv_SQR_Chute.pdf, page 35

Preserve the square-chute alarm interpretation

One beep concerns low water and two an extended DRAIN selection. Four indicate repeated high-pressure protection: leave the unit off for service. Eight relates to the gear motor; nine can concern the infrared bin control or mechanical backup paddle. Record the count and avoid bypassing the bin control or importing newer ten-beep temperature meanings.

F-1501_2001M_J(_C)_serv_SQR_Chute.pdf, page 40

Plan cleaning and wear inspections as separate tasks

Six-month service includes sanitizing the machine and bin and checking drain components and seal bolts. Monthly filter and bin-lens checks and annual bearing, hose and valve inspections are also listed. Ask service to apply only the equipment-specific parts of the combined maintenance schedule to the MLJ low-side configuration.

F-1501_2001M_J(Z)(3)(-C)(-SC)_inst.pdf, page 43
FS-1501MLJ-C: remote system and bin-control alarms3 topics Back to models and manuals

Manual 73239 issued August 1, 2019; FS-1501MLJ-C with SRC-14J context. Do not substitute the FS-1500 or FS-1001/1022 control table. | Document: 73239 | Issued: 2019-08-01

Companion manufacturer operating and maintenance instructions | Issued: 2019-06-10 | Revised: 2023-10-24

A stopped ice head is not the entire system diagnosis

The ice-making unit and SRC equipment have separate power checks. Water-filter restrictions, float problems, drain leakage and a dirty infrared bin lens are also documented causes of no ice. Tell the technician whether other equipment lost power and whether the bin had just filled; leave electrical and remote-system checks to service.

FS-1501MLJ-C_serv.pdf, page 33

Four and nine beeps point to different protections

Four beeps indicate repeated high-pressure operation and require leaving the machine off for service. Nine can identify the primary infrared bin control or the backup spout-cover magnet being disengaged. Do not wedge the cover closed or bypass its protection. Unlike the smaller FS service family, this manual does include the three/four pressure alarms.

FS-1501MLJ-C_serv.pdf, page 38

Bin-lens care does not replace sanitizing

The maintenance schedule includes monthly bin-lens and water-filter attention. Cleaning and sanitizing the machine and bin, inspecting drains and checking seal bolts are six-month service tasks. Keep yearly bearing and condenser inspections on the schedule even when the machine continues producing ice normally.

FS-1501MLJ-C_inst.pdf, page 31
FS-1001MLJ-C and FS-1022MLJ-C: low-water and drive alarms3 topics Back to models and manuals

Manual 73222 revised September 4, 2019, with SRC-10J instruction context. Three/four beep entries are marked not applicable; FS-1501 pressure and backup-cover interpretations are not transferred. | Document: 73222 | Issued: 2018-03-22 | Revised: 2019-09-04

Companion manufacturer operating and maintenance instructions | Issued: 2019-05-10 | Revised: 2023-08-14

Record water interruptions and remote-unit power history

No production can involve a restricted filter, water-fill or float trouble, drain leakage, bin sensing or the SRC power supply. Note whether the problem began after a water outage or a full-bin stop. Have a technician inspect the connected system rather than assuming that an empty bin means the compressor failed.

FS-1001_1022_1500MLJ-C_serv.pdf, page 30

Do not read these alarms as FS-1501 codes

In this edition, one beep concerns low water, two indicate DRAIN selected too long, five is a freeze-timer protection and eight relates to the gear motor. Three and four are marked not applicable. Record the count for service; do not use the FS-1501 pressure-alarm map or attempt controller changes to make it fit.

FS-1001_1022_1500MLJ-C_serv.pdf, page 35

Keep the infrared lens on the monthly checklist

The instructions include monthly infrared bin-lens cleaning with warm water and external-filter attention. Machine/bin cleaning and sanitizing and drain inspections are scheduled every six months. Annual bearing and other mechanical checks require service personnel; lens care alone does not cover the internal ice path.

FS-1001_1022_MLJ-C_inst.pdf, page 31
IM-544SAK: cycle timeouts, EE and annual care3 topics Back to models and manuals

Manual 73273 revised June 18, 2026. E1 uses a 45-minute freeze backup limit; tank-opening and tank-closing protections use three minutes. These limits are not the IM-200BAK settings. | Document: 73273 | Issued: 2026-01-02 | Revised: 2026-06-18

Companion manufacturer operating and maintenance instructions | Issued: 2026-01-15

E1 and E2 identify stalled cycles, not a confirmed failed part

E1 means the freeze backup timer expired; E2 means harvest exceeded its backup limit. The listed service checks include water and hot-gas valve behavior, pump operation, temperature sensing and the refrigeration circuit. Photograph the display and describe the last normal cycle. Repeated resets do not identify or repair the cause.

IM-544SAK_serv.pdf, page 46

EE needs the stored error, not a guessed diagnosis

Faults other than E1 and E2 appear as EE at the time of occurrence. The technician must read the error history to distinguish tank movement, temperature sensing or control problems. Opening and closing timeouts are separate faults; do not force the water tank or assume EE means a replacement board is needed.

IM-544SAK_serv.pdf, page 46 IM-544SAK_serv.pdf, page 47

Annual sanitizing is separate from routine filter care

The user schedule includes daily scoop care, air-filter attention every two weeks and monthly exterior cleaning. Service includes monthly water-filter and bin-entry checks and at least yearly cleaning and sanitizing, hose inspection and condenser attention. Do not run a cleaning wash with an empty water tank.

IM-544SAK_inst.pdf, page 23 IM-544SAK_inst.pdf, page 24
IM-200BAK: display faults and maintenance3 topics Back to models and manuals

Manual 73265 revised June 2, 2026. The freeze backup limit is 50 minutes and tank closing uses 50 seconds, unlike IM-544SAK. E9 and Ed are explicitly unused for this model. | Document: 73265 | Issued: 2025-09-25 | Revised: 2026-06-02

Companion manufacturer operating and maintenance instructions | Issued: 2025-09-15

E1 and E2 require different cycle checks

E1 reports that the freeze backup limit was reached; E2 reports a harvest timeout. Water-valve leakage, pump performance, hot-gas operation, temperature sensing and refrigeration performance are possible service checks, not a parts diagnosis from the display alone. Preserve the code and describe whether ice formed before the stop.

IM-200BAK_serv.pdf, page 48

EE does not identify which tank or control fault occurred

The normal display groups faults other than E1 and E2 under EE. The stored history can distinguish a tank-opening timeout from a closing timeout or other faults. Do not force the moving tank or clear history before the technician records it. A code list from another IM model can give the wrong timing and component interpretation.

IM-200BAK_serv.pdf, page 47 IM-200BAK_serv.pdf, page 48

Use the undercounter maintenance intervals

Daily scoop care and air-filter attention every two weeks sit alongside monthly exterior and water-filter checks. Arrange machine and bin cleaning and sanitizing at least yearly, with hose and condenser inspections. More frequent service may be necessary in demanding conditions; a wiped exterior does not establish a sanitized ice path.

IM-200BAK_inst.pdf, page 24 IM-200BAK_inst.pdf, page 25
IM-50BAA-LM: large-cube cycle and motor messages3 topics Back to models and manuals

M041-1092 issued August 31, 2023, Q/LM service edition, applied here only to the associated LM identity. PDF page numbers are one greater than printed page numbers; no automatic substitution for the Q-only 2020 edition. | Document: M041-1092 | Issued: 2023-08-31

E1 and E2 distinguish freeze from harvest trouble

This edition uses E1 for a freeze cycle reaching its 45-minute backup limit and E2 for a harvest reaching its 30-minute limit. Record the display and whether ice released before the stop. Those messages identify the interrupted stage; they do not establish a particular failed part or justify repeated resets.

IM-50BAA-Q(-LM)_serv.pdf, page 35

EE can conceal a tank, fan or pump fault

The display presents other errors as EE, with the specific entry retained in the error log. The table distinguishes tank movement, fan lock E7, pump lock E8 and temperature-sensor faults. A pump-lock entry can precede shutdown after repeated detections. Leave moving components and error-history retrieval to service personnel.

IM-50BAA-Q(-LM)_serv.pdf, page 34 IM-50BAA-Q(-LM)_serv.pdf, page 35

Keep annual cleaning on the calendar

Arrange cleaning and sanitizing at least once a year, with more frequent attention when conditions warrant it. The maintenance table also calls for daily scoop care, air-filter inspection every two weeks and monthly water-filter attention. Use the LM model identification when scheduling service so the correct manual edition follows the equipment.

IM-50BAA-Q(-LM)_serv.pdf, page 56
IM-50BAA-Q: 2020-edition display and care guidance3 topics Back to models and manuals

Q-only M041-1092 issued May 1, 2020. PDF pages 27/28 and 46 correspond to printed pages 26/27 and 45. The later Q/LM manual is not silently substituted. | Document: M041-1092 | Issued: 2020-05-01

A freeze timeout is different from a release timeout

E1 marks the 45-minute freeze backup limit; E2 marks the 30-minute harvest limit in this Q service edition. Tell service whether the fault occurs before cubes form or while the machine is trying to release them. Do not treat either timer message as proof that the control board itself has failed.

IM-50BAA-Q_serv.pdf, page 28

Have service identify the error behind EE

EE groups the other faults on the normal display. The recorded detail may concern water-tank travel, a locked fan or pump, high temperature, stored control data or the evaporator thermistor. Preserve the displayed message and operating history. Do not push the tank, reach into moving parts or replace a component based only on EE.

IM-50BAA-Q_serv.pdf, page 27 IM-50BAA-Q_serv.pdf, page 28

Routine cleaning and annual sanitizing serve different purposes

Daily scoop care and biweekly air-filter inspection help keep routine use orderly, while the water filter needs monthly attention. The machine and bin require cleaning and sanitizing at least yearly. Ask for the complete service schedule when arranging that visit, particularly if filter care has been the only maintenance performed.

IM-50BAA-Q_serv.pdf, page 46
DCM-271BAK and -OS: dispensing versus ice production3 topics Back to models and manuals

Manual 73259 issued August 15, 2025. -OS uses an optical dispensing sensor; standard BAK uses push-button control. That optical sensor is not the mechanical bin-level control, and no nine/ten-beep alarm is assigned. | Document: 73259 | Issued: 2025-08-15

Companion manufacturer operating and maintenance instructions | Issued: 2024-12-18 | Revised: 2025-08-21

Ice in the bin but none at the outlet is a dispensing complaint

Tell service whether ice is already present and whether water still dispenses. Ice-delivery checks include the dispensing control, shutter and drive; water delivery has its own supply and valve checks. The -OS optical activation sensor and standard push-button controls are different, so include the suffix when reporting the fault.

DCM-271BAK(-OS)_serv.pdf, page 43 DCM-271BAK(-OS)_serv.pdf, page 44

Beep alarms concern production protections

One beep signals low water and two indicate DRAIN selected too long. Four beeps mean repeated high-pressure events: turn the machine off and call service. Eight concerns the gear-motor fuse or protector. An -OS dispensing-sensor complaint is not a nine-beep bin-sensor diagnosis; do not bypass protection or replace fuses yourself.

DCM-271BAK(-OS)_serv.pdf, page 49 DCM-271BAK(-OS)_serv.pdf, page 50

Sanitize the bin and check the drains every six months

The schedule separates air-filter attention every two weeks and monthly exterior/water-filter care from six-month machine and bin sanitizing. Drain components and seal bolts need service inspection, with yearly condenser and bearing checks. A clean dispensing face does not establish that the storage bin and internal ice path have been sanitized.

DCM-271BAK(-OS)_inst.pdf, page 27
DCM-751BWH and -OS: water-cooled dispensing and alarms3 topics Back to models and manuals

Water-cooled BWH identities only, manual 73184 revised September 24, 2014. Standard push-button and -OS optical activation are distinct. Air-cooled BAH maintenance and the table row marked unused for alarm nine are not applied. | Document: 73184 | Issued: 2012-08-31 | Revised: 2014-09-24

Companion manufacturer operating and maintenance instructions | Issued: 2011-03-23

Separate a dispensing failure from an empty-bin problem

When ice is available but does not dispense, the service checks include the activation control, shutter, dispensing motor and agitator. The -OS version has optical activation instead of the standard push-button arrangement. Report whether water delivery also stopped; its supply and valve checks are a separate branch.

DCM-751B_H(-OS)_serv.pdf, page 31

Do not confuse optical activation with an alarm code

The service alarm table uses one beep for low water, two for an extended DRAIN selection and eight for the gear motor. Four beeps require leaving the machine off after repeated high-pressure events. The infrared nine-beep row is explicitly unused on this model, even when the dispenser has an -OS activation sensor.

DCM-751B_H(-OS)_serv.pdf, page 35

Match maintenance to the water-cooled configuration

Arrange machine/bin sanitizing and drain-pan, line and drip-tray attention every six months, alongside monthly water-filter checks. Annual bearing and other service inspections still apply. Have the technician follow the water-cooled condenser requirements; do not borrow the air-cooled BAH filter or condenser-cleaning procedure merely because it shares the instruction cover.

DCM-751B_H(-OS)_inst.pdf, page 29

Maintenance

Prevent avoidable breakdowns

Maintenance intervals come from the instructions for the exact model and its operating conditions. Heavy use, heat, dust, grease, hard water, and poor ventilation can shorten the interval.

Keep airflow clear

Clean accessible filters and keep vents, coils, and surrounding space free of dust, grease, boxes, and fabric.

Watch for early changes

Longer cycles, unstable temperature, new sounds, leaks, and repeated error messages are reasons to schedule service before a shutdown.

Use the exact instructions

Cleaning products, procedures, filters, and intervals vary by model. Follow the manufacturer instructions for the exact equipment.

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Same-day service is available based on the schedule. Call (323) 433-6360 for the quickest confirmation.

How much is the service call?

The diagnostic service call is $85 for home appliances and $120 for business equipment. If you approve the repair, this fee is applied toward the total cost.

Do you repair Hoshizaki equipment in Los Angeles?

Yes. Bastion Service schedules on-site diagnosis and repair in Los Angeles for supported equipment and brands.

Should I have the model number ready?

It helps, especially when a part or manual must be matched. A clear photo of the model and serial label is enough.

Will I get a price before the repair?

Yes. The technician diagnoses the problem and provides an estimate before approved repair work begins.

Is the repair covered by a warranty?

Completed repairs include a 90-day repair warranty.

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