Hoshizaki KMS-1401MLJ service manual IV. Service Diagnosis, Diagnostic Procedure

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IV. Service Diagnosis

WARNING

•This icemaker should be diagnosed and repaired only by qualified service personnel to reduce the risk of death, electric shock, serious injury, or fire.

•Risk of electric shock. Use extreme caution and exercise safe electrical practices.

•Moving parts (e.g., fan blade) can crush and cut. Keep hands clear.

•CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after the icemaker is serviced. Make sure that none have fallen into the dispenser unit/storage bin.

•Make sure all food zones in the icemaker and dispenser unit/storage bin are clean after service. For cleaning procedures, see "VI. Cleaning and Maintenance."

A.Diagnostic Procedure

The diagnostic procedure is basically a sequence check which can be used at icemaker startup or for system diagnosis. This procedure allows you to diagnose electrical system and component failures. Before conducting the diagnostic procedure, check for correct installation, proper voltage per unit nameplate, and adequate water supply. Check CB using the steps in "IV.B. Control Board Check." Check the dip switch settings to assure that S4 dip switch 3, 4, 7, 8, 9, 10 and S5 dip switch 1 through 5 are in the factory default position. S4 dip switch 1, 2, 5, 6 are cleaning adjustments and the settings are flexible. For factory default settings, see "II.C.3.a) Default Dip Switch Settings." As you go through the procedure, check to assure the components energize and de-energize correctly. If not, those components and controls are suspect.

1)Turn off the power supply, then access the control box. Clear any ice from BC.

2)Turn on the power supply, then move the control switch to the "ICE" position. A 5‑second delay occurs. The red "POWER OK" LED and the green "BC CLOSED" LED on CB come on. If the yellow "BC OPEN" LED is on, check BC. See "IV.C. Bin Control Check and Cleaning."

3)1-Minute Fill Cycle – LED 4 is on. WV1 energizes. After 1 minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If closed, continue to step 4. If F/S is open, WV1 remains energized through additional 1-minute fill cycles until water enters the water tank and F/S closes (low water safety protection during initial start up and at the end of each harvest). Diagnosis: Confirm that water enters the water tank. If not, check that the water supply shut-off valve is open and screens or external filters are clear. Check supply voltage at WV1 solenoid. If no voltage is present, see "IV.B. Control Board Check." If voltage is present, check solenoid continuity. If the water tank fills, but the icemaker fails to start harvest, check for open F/S. See "IV.D. 1. Float Switch Check." Check termination of 1‑minute timer in CB. See "IV.B. Control Board Check."

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Contents Modular Crescent Cuber Serenity Series Model Hoshizaki AMERICA, INC Contents Page Important Safety Information For KMS For SRKSpecifications Icemaker KMS-1401MLJ with SRK-14JData Pending KMS-1401MLJ with SRK-14J3Condensing Unit SRK-14JSRK-14J3 II. General Information Construction IcemakerCondensing Unit Minute Fill Cycle Sequence of OperationSequence Cycles and Shutdown Initial Harvest CycleHarvest Cycle S4 Dip Switch Setting Pump-Out 1st Pump-Out FrequencyPump-Out Cycle ShutdownFlow SequenceControl Board Control Board Layout Control BoardSequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Every 3 sec Energized Time LEDs are On Components Min Max AvgS4 Dip Switch Controls and AdjustmentsDefault Dip Switch Settings Harvest Timer S4 dip switch 1Pump-Out Timer S4 dip switch 3 Pump-Out Frequency Control S4 dip switch 5S4 Dip Switch Setting Time seconds Inlet Water Valve Freeze Timer S4 dip switch 9 Harvest Pump Timer S4 dip switchFactory Use S4 dip switch S4 Dip Switch Setting Pump Motor Time secondsS5 Dip Switch Setting No. of Refills No.4 Float Switch Selector S5 dip switchRefill Counter S5 dip switch 2 through RefillCirc Control and Service SwitchesDrain WashIII Wiring Diagrams Transformer 10.5V atControl Output Control Transformer Output 10.5V atSRK Condensing Unit Wire Harness ConnectionsWire Harness Connections KMS Icemaker Unit factory connectedPerformance Data Production PER 24 HRData Pending IV. Service Diagnosis Diagnostic ProcedurePage Page Page Control Board Check Bin Control Check and Cleaning Bin Control CheckBin Control Cleaning Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Thermistor Check Diagnostic Charts No Ice ProductionNo Ice Production Possible Cause Freeze-Up Freeze-Up Possible Cause Harvest CycleFreeze-Up Possible Cause Freeze CycleLow Ice Production Low Ice Production Possible Cause Long Harvest CycleLong Freeze Cycle Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Brazing Evacuation and Recharge R-404APage Important Notes for Component Replacement ComponentVI. Cleaning and Maintenance Cleaning and Sanitizing InstructionsCleaning Procedure Sanitizing Procedure Following Cleaning Procedure Storage Bin Scoop MaintenanceStainless Steel Exterior Dispenser Unit/Storage BinPreparing the Icemaker for Periods of Non-Use Page VII. Disposal

Condensing Unit Models SRK-14J/3, KMS-1401MLJ specifications

The Hoshizaki KMS-1401MLJ and the Condensing Unit Models SRK-14J/3 are critical components in the commercial refrigeration sector, designed to provide efficient and reliable cooling for various applications. These models stand out for their exceptional performance, advanced technologies, and robust characteristics that meet the demanding needs of food service, hospitality, and retail establishments.

One of the primary features of the Hoshizaki KMS-1401MLJ is its high-capacity cooling capability. With a refrigerating capacity suitable for larger applications, this unit is designed to handle significant load demands while maintaining energy efficiency. This is particularly advantageous in environments where consistent temperature control is vital for preserving perishable goods.

The SRK-14J/3 models further enhance the functionality of this system by incorporating advanced inverter technology. This innovation allows for variable speed operation, adjusting the compressor's output based on the actual cooling demand. As a result, users can experience reduced energy costs and lower environmental impact. This efficiency not only decreases the overall operating expenses but also extends the lifespan of the unit due to reduced wear and tear on the compressor.

The Hoshizaki units are also renowned for their user-friendly interface, which features intuitive controls for easy operation and monitoring. This ensures that users can quickly adjust settings to accommodate specific storage needs, improving overall convenience and efficiency in the workplace.

Additionally, both the KMS-1401MLJ and the SRK-14J/3 models are designed with durability in mind. Constructed from high-quality materials, they are built to withstand the rigorous demands of a commercial kitchen or storage facility. Features such as corrosion-resistant coatings and robust insulation enhance the longevity of these units, making them a wise investment for business owners.

In terms of maintenance, Hoshizaki has incorporated several design elements to facilitate ease of service. Access points for routine checks and cleaning have been strategically placed, enabling technicians to perform maintenance tasks without disrupting the operation of the units.

In conclusion, the Hoshizaki KMS-1401MLJ and Condensing Unit Models SRK-14J/3 offer a perfect blend of efficiency, durability, and technological advancement. Their ability to provide reliable cooling solutions makes them integral to any establishment focused on quality and performance in food and beverage storage. For businesses seeking to enhance operational efficiency while ensuring the preservation of their products, these models represent a leading choice in the commercial refrigeration market.
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