Hoshizaki KMD-410MAH, KMD-410MWH manual

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a. Lower Float Switch 1st Activation: Refill – The refill can occur at any time during the freeze cycle (1 refill per cycle). As ice builds the water level drops in the reservoir and the lower float switch activates (opens). LED 5 comes on and the control board energizes the fill water valve. The fill water valve remains energized until the upper float switch closes or the 1 minute fill timer terminates, whichever comes first.

b. Lower Float Switch 2nd Activation: The unit is held in freeze by a 5 minute short cycle protection timer which starts after the thermistor temperature reaches 2°C. After the 1st lower float switch activation and refill, ice continues to form and the water level drops in the reservoir. When the lower float switch activates (opens) a second time, the freeze cycle terminates (freeze can only be terminated on the second activation of the lower float switch and after the minimum freeze period). Diagnosis: During the minimum freeze period, confirm that the evaporator temperature drops, compressor, fan motors and pump motor are energized and that the hot gas valves, harvest water valve and fill water valve (except during refill) are de-energized and not bypassing. Make sure the expansion valves are operating properly and, in cold conditions. Make sure that the drain water valve is not leaking by (water flowing down the potable drain). Check for proper unit pressures, or an inoperative compressor. Disconnect the 3-pin float switch connector from the control box. 15 seconds after disconnecting the 3-pin float switch connector, LED 5 comes on and refill begins. Connect the 3-pin float switch connector back on the control box. When the refill is finished (LED 5 goes off), disconnect the 3-pin float switch connector again. If 5 or more minutes have elapsed in the freeze cycle, the unit should switch out of the freeze cycle. After the unit switches out of freeze, reconnect the 3-pin float switch connector to the control box. If the unit remains in freeze with the float switch disconnected, replace the board. To check the float switch, see "II. 5. [c] FLOAT SWITCH CHECK PROCEDURE."

Note: Normal freeze cycle will last 20 to 40 minutes depending on model and conditions. Cycle times and pressures should follow performance data provided in this manual.

6)Drain Cycle – The compressor remains energized, the hot gas valve energizes, the fan motor de-energizes. The drain valve and pump motor energize, allowing water to drain from the tank for 20 seconds. This removes contaminants from the water tank. Diagnosis: If the drain valve does not open, check the circuit. Check for proper voltage. If water does not drain out, check and clean the tubing at the drain valve and then check and clean the valve assembly.

7)Normal Harvest Cycle – same as the initial harvest cycle – Return to step 4.

Note: Unit continues to cycle until bin control is satisfied or power is turned off. (The drain cycle can be adjusted to occur every cycle, or every 2, 5, or 10 cycles. The factory default is every 10 cycles.) The unit always restarts at the 1 minute fill cycle.

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Contents Page Page Contents Page Specifications KMD-410MAH air-cooledKMD-410MWH water-cooled Water Cooled CondenserII. General Information Construction KMD-410MAHKMD-410MWH Sequence of Operation ONE Minute Fill CycleInitial Harvest Cycle Freeze CycleNormal Harvest Cycle KMD-410MAH, 410MWH Control Board Control Board Layout Features Maximum Water Supply Period 6 minutes Harvest Backup Timer and Freeze TimerHigh Temperature Safety Low Water SafetyLED Lights and Audible Alarm Safeties Sequence of OperationControls and Adjustments Default Dip Switch Settings Harvest Timer S1 dip switch 1Water Saver Timer S1 dip switch 7 Drain Timer S1 dip switch 3Drain Frequency Control S1 dip switch 5 Factory Use S2 dip switch 5 Program Ver .5 or earlier Freeze Timer S1 dip switch 9Pump-Out Pump Motor Delay S2 dip switch Refill Counter S2 dip switch 3 Program Ver .1, Ver Anti-Slush Control S2 dip switch 6 Program Ver Control Board Check Procedure Control Board ReplacementHarvest Control Thermistor Float Switch CleaningFloat Switch Check Procedure Explanation of OperationBIN Control Check Procedure BIN ControlService Switch SwitchesControl Switch Page Wiring Diagram Magnetic contactor wiring depends on the contactor modelChart TimingPerformance Data 148440 IV. Service Diagnosis Minute Diagnostic Procedure Page Diagnostic Charts No ICE ProductionPage See II . d Control Board Check Procedure Evaporator is Frozen UP LOW ICE Production Abnormal ICEOther Removal and Replacement Service for Refrigerant Lines Refrigerant Recovery Evacuation, Vacuum Pump and Refrigerant Charge R404ARefrigerant Leak Check Evacuation and RechargeBrazing Compressor Drier HOT GAS Valve Expansion Valve Evaporator Water Regulating Valve WATER-COOLED Model only Adjustment of Water Regulating Valve WATER-COOLED Model only FAN MotorPump Motor Drain VALVE, Cleaning Valve Water ValveWater Tank Float Switch BIN Control Switch Thermistor Control BOX Push Buttons Control & Service Switch FuseFuse Holder Control BoardSpray TUBE, Water Supply TUBE, Spray Guide StarterRUN Capacitor Start CapacitorTabs Hose Band Water Supply Tube Under Spray Tube VI. Cleaning and Maintenance Instructions Cleaning ProcedurePage Page Maintenance Sanitizing Procedure Following Cleaning ProcedurePreparing the Icemaker for Long Storage Stainless Steel ExteriorStorage BIN and Scoop AIR Filters AIR-COOLED Model onlyRemove the water from the icemaker water supply line Drain the water tank
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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.