Hoshizaki KM-1300MAH, KM-1300MWH Minute Fill Cycle, Harvest Cycle, Freeze Cycle, Reverse Pump Out

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problem occurs. At startup a 5 second delay occurs while the board conducts an internal timer check. A short beep occurs when the power switch is turned ON or OFF.

The green LED’s 1-4 represent the corresponding relays and energize and sequence 5 seconds from initial startup as follows:

Sequence Step

LED’s on Length: Min.

Max.

Avg.

1 Minute Fill Cycle

LED4

 

 

60 sec.

Harvest Cycle

LED1, 4, & 2

2 min.

20 min.

3-5 min.

Freeze Cycle

LED1

5 min.

60 min.

30-35 min.

Reverse Pump Out

LED1, 3, & 2

10 sec.

20 sec.

Factory set.

{LED 1 – Comp; LED 2 - HGV/CFM;

LED 3 – PM;

LED 4 - WV}

 

The built in safeties shut down the unit and have alarms as follows:

1 beep every 3 sec. = High Evaporator Temperature >127 ° F.

Check for defrost problem (stuck HGV or relay), hot water entering unit, stuck headmas- ter, or shorted thermistor.

2 beeps every 3 sec. = Defrost Back Up Timer. Defrost >20 minutes. Orange LED marked 20 MIN energizes.

Check for open thermistor, HGV not opening, TXV leaking by, low charge, or inefficient compressor.

3 beeps every 3 sec. = Freeze Back Up Timer. Freeze > 60 minutes. Yellow LED marked 60 MIN energizes.

Check for F/S stuck closed (up), WV leaking by, HGV leaking by, TXV not feeding prop- erly, low charge, or inefficient compressor.

To manually reset the above safeties, depress white alarm reset button with the power supply ON.

6 beeps every 3 sec. = Low Voltage. Voltage is 92 Vac or less.

7 beeps every 3 sec. = High Voltage. Control voltage > 147Vac ±5%. The red LED will de-energize if voltage protection operates.

The voltage safety automatically resets when voltage is corrected.

The Output Test switch “S3” provides a relay sequence test. With power OFF, place S3 ON and switch power to ICE. The correct lighting sequence should be none, 2, 3, 4, 1, & 4, normal sequence every 5 seconds. S3 should remain in the “OFF” position for normal operation.

The application switch located between relay X3 & X4 must be set to match the original board application. Place this switch in the ALP position if there is no white wire supplied

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Contents KM-1300MAH KM-1300MWH KM-1300MRH Hoshizaki AMERICA, INC Contents Maintenance Specifications KM-1300MAH Air-cooled2a. KM-1300MWH Water-cooled 2b. KM-1300MWH Water-cooled Serial No. M10156D KM-1300MRH Remote air-cooled Condensing Unit URC-12F Specifications Model URC-12F II. General Information Construction KM-1300MWH Water-cooled KM-1300MRH Remote air-cooled Features of Control Products E Controller Board Controller BoardSOLID-STATE Control Controller BoardPage Beep every 3 sec. = High Evaporator Temperature 127 F Minute Fill CycleHarvest Cycle Freeze CycleControl Products HOS-001A Board Sequence 1st Cycle 2nd Cycle and after with pump drain 2nd Cycle and after with no pump drain Controls and Adjustments Setting Time Setting Frequency Checking the Controller Board Page III. Technical Information KM-1300MWH Water-cooled KM-1300MRH Remote air-cooled Wiring Diagrams KM-1300MAH Air-cooled and KM-1300MWH Water-cooledCut-out 412 ±21.3 Psig Cut-in 327±21.3 Psig Timing Chart Page Performance Data Serial # L00001F to M10155C KM-1300MWH Water-cooled Serial # M10156D KM-1300MRH Remote air-cooled IV. Service Diagnosis No ICE Production Problem Possible Cause RemedyController Board Problem Possible Cause Remedy Evaporator is Frozen UP LOW ICE ProductionAbnormal ICE OthersRefrigerant Recovery Service for Refrigerant LinesEvacuation and Recharge R-404A Brazing Removal and Replacement of Compressor Important Removal and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of HOT GAS Valve and Line Valve Removal and Replacement of Evaporator Important Page Page Page Removal and Replacement of Thermistor Important Removal and Replacement of FAN Motor Removal and Replacement of Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes VI. Maintenance and Cleaning Instructions Preparing the Icemaker for Long StoragePage Cleaning Cleaning Procedure Sanitizing Procedure Following Cleaning Procedure Page Maintenance