Hoshizaki KMD-410MWH, KMD-410MAH manual Control Board Check Procedure, Control Board Replacement

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[d] CONTROL BOARD CHECK PROCEDURE

Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis.

1)Check the dip switch settings to assure that S1 dip switch 3, 4, 7, 8, 9, & 10 and S2 dip switch 1 through 6 are in the factory default position. S1 dip switch 1, 2, 5, & 6 are cleaning adjustments and the settings are flexible.

2)Move the control switch to the "ICE" position and check for proper control voltage. If the "POWER OK" LED is on, the control voltage is good. If the "POWER OK" LED is off, check the control transformer circuit. If no voltage is present, check the power supply circuit.

3)The output test button provides a relay sequence test. Make sure the control switch is in the "ICE" position, then press the "OUTPUT TEST" button. The correct lighting sequence should be 5, 6, 7, 8, 9, 4. Some components (e.g., the compressor) will cycle during the test. Each LED flashes three times in 5 seconds. LED 5 continues to flash while LED 6 flashes. Following the output test sequence, the icemaker will resume normal operation beginning with the 1 minute fill cycle.

[e] CONTROL BOARD REPLACEMENT

The dip switches should be adjusted to the factory default settings as outlined in this manual. S2 dip switch 5 must remain off.

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Contents Page Page Contents Page KMD-410MAH air-cooled SpecificationsWater Cooled Condenser KMD-410MWH water-cooledKMD-410MAH II. General Information ConstructionKMD-410MWH ONE Minute Fill Cycle Sequence of OperationInitial Harvest Cycle Freeze CycleNormal Harvest Cycle KMD-410MAH, 410MWH Control Board Control Board Layout Harvest Backup Timer and Freeze Timer Features Maximum Water Supply Period 6 minutesHigh Temperature Safety Low Water SafetySequence of Operation LED Lights and Audible Alarm SafetiesHarvest Timer S1 dip switch 1 Controls and Adjustments Default Dip Switch SettingsDrain Timer S1 dip switch 3 Drain Frequency Control S1 dip switch 5Water Saver Timer S1 dip switch 7 Freeze Timer S1 dip switch 9 Pump-Out Pump Motor Delay S2 dip switchFactory Use S2 dip switch 5 Program Ver .5 or earlier Refill Counter S2 dip switch 3 Program Ver .1, Ver Anti-Slush Control S2 dip switch 6 Program Ver Control Board Replacement Control Board Check ProcedureHarvest Control Thermistor Cleaning Float SwitchFloat Switch Check Procedure Explanation of OperationBIN Control BIN Control Check ProcedureSwitches Control SwitchService Switch Page Magnetic contactor wiring depends on the contactor model Wiring DiagramTiming Chart148 Performance Data440 IV. Service Diagnosis Minute Diagnostic Procedure Page No ICE Production Diagnostic ChartsPage See II . d Control Board Check Procedure Evaporator is Frozen UP Abnormal ICE LOW ICE ProductionOther Removal and Replacement Service for Refrigerant Lines Evacuation, Vacuum Pump and Refrigerant Charge R404A Refrigerant RecoveryRefrigerant Leak Check Evacuation and RechargeBrazing Compressor Drier HOT GAS Valve Expansion Valve Evaporator Water Regulating Valve WATER-COOLED Model only FAN Motor Adjustment of Water Regulating Valve WATER-COOLED Model onlyPump Motor Water Valve Drain VALVE, Cleaning ValveWater Tank Float Switch BIN Control Switch Thermistor Control BOX Push Buttons Fuse Control & Service SwitchFuse Holder Control BoardStarter Spray TUBE, Water Supply TUBE, Spray GuideRUN Capacitor Start CapacitorTabs Hose Band Water Supply Tube Under Spray Tube Cleaning Procedure VI. Cleaning and Maintenance InstructionsPage Page Sanitizing Procedure Following Cleaning Procedure MaintenanceStainless Steel Exterior Preparing the Icemaker for Long StorageStorage BIN and Scoop AIR Filters AIR-COOLED Model onlyDrain the water tank Remove the water from the icemaker water supply line
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KMD-410MWH, KMD-410MAH specifications

The Hoshizaki KMD-410MWH and KMD-410MAH are premier ice makers, designed for commercial establishments that require high-efficiency ice production. These units stand out for their advanced features and technology that cater to the diverse needs of restaurants, bars, and hotels.

One of the primary features of the KMD-410 lineup is its impressive ice production capacity. With a production rate of up to 410 pounds of cube ice in a 24-hour period, each model ensures a steady supply of ice, which is essential for businesses with high demand. The ice produced is in the form of clear, hard cubes, ideal for beverage cooling, cocktail preparation, and food presentation.

Both models showcase the unique Hoshizaki ice-making system, which employs a direct cooling method. This technology uses individual stainless steel evaporators to produce ice, resulting in more uniform cubes and less waste. The stainless steel construction contributes to the durability of the units, making them suitable for rugged commercial environments.

Energy efficiency is another hallmark of the KMD-410MWH and KMD-410MAH. These machines are designed with an energy-saving mode that reduces power consumption without compromising ice production. This is critical for businesses looking to minimize operational costs while maintaining high standards of service.

User convenience is prioritized in these models through features like the easy-to-clean design. The internal components can be accessed quickly, allowing for simpler maintenance and sanitation processes. Additionally, the built-in cleaning cycle aids in maintaining ice purity and preventing bacterial growth, which is essential for food safety.

The KMD-410MAH also includes an advanced monitoring system with indicators for water usage and ice levels. This feature allows operators to keep track of performance and make necessary adjustments, ensuring that the ice maker operates at peak efficiency.

For installation flexibility, both models can be paired with various storage bins and dispensers, adapting to the layout of any establishment. Furthermore, they can be equipped with optional filtration systems that enhance water quality, further improving the taste and clarity of the ice produced.

In summary, the Hoshizaki KMD-410MWH and KMD-410MAH ice makers are exemplary choices for any business that demands high-quality, reliable ice production. Their robust features, energy-efficient operation, and user-friendly design make them indispensable assets in the hospitality and foodservice industries.
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