Hoshizaki KM-630MWH, KM-630MRH, KM-630MAH service manual Models with Thermostat

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SETTING

 

FREQUENCY

Dip Switch

Dip Switch

 

No. 5

 

No. 6

 

OFF

 

OFF

every cycle

ON

 

OFF

every 2 cycles

OFF

 

ON

every 5 cycles

ON

 

ON

every 10 cycles

5) Freeze Timer

CAUTION

Adjust to proper specification, or the unit may not operate correctly.

Two new dip switches numbered 9 and 10 have been added to the improved “E” board to better prevent possible freeze ups. These settings come factory set to the default setting of 60 min. (OFF, OFF). Check the adjustment chart published in the Tech Specs for proper settings. If the old board does not have these two dip switches, (only 8 instead of 10), leave setting as OFF, OFF.

SETTING

 

TIME

Dip Switch

Dip Switch

 

No. 9

 

No. 10

 

OFF

 

OFF

60 min.

ON

 

OFF

70 min.

OFF

 

ON

50 min.

ON

 

ON

60 min.

6) Bin Control

MODELS WITH THERMOSTAT

CAUTION

When the ambient temperature is below 45°F, the Bin Control Thermostat operates to stop the icemaker even if the Ice Storage Bin is empty. When the Thermostat is set in the prohibited range, the icemaker operates con- tinuously even if the Ice Storage Bin is filled with ice. Setting in the prohib- ited range might cause severe damage to the icemaker resulting in failure.

No adjustment is required under normal use, as the Bin Control is factory-adjusted. Ad- just it, if necessary, so that the icemaker stops automatically within 10 seconds after ice contacts the Bin Control Thermostat Bulb.

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Contents KM-630MAH KM-630MWH KM-630MRH Hoshizaki AMERICA, INC Contents Maintenance Specifications KM-630MAH Water TEMP. F2a. KM-630MWH Serial #L00001D M20270B 2b. KM-630MWH Serial #M20301E KM-630MRH Condenser Unit URC-6FSpecifications II. General Information Construction KM-630MAHKM-630MWH KM-630MRH 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 Important Water Valve opening is limited to 6 minutes2nd Cycle and after with pump drain 2nd Cycle and after with no pump drain Controls and Adjustments For Models with ThermostatPage Setting Time Models with Thermostat Models with Mechanical BIN Control Checking the Controller BoardProximity Switch Mechanical BIN ControlExplanation of Operation Troubleshooting Mechanical BIN Control only KM-630MAH KM-630MWH KM-630MRH Wiring Diagrams Page B1 KM-630MRH with auxiliary codes L-0, M-0, M-1 B2 KM-630MRH with auxiliary codes M-2 and after Timing Chart Page Performance Data 157B1 KM-630MWH Serial #L00001D M20270B Pressure Drop of Cooling Water LineB2 KM-630MWH Serial #M20301E 603 IV. Service Diagnosis 1. no ICE Production Problem Possible Cause RemedyController Board Problem Possible Cause Remedy Evaporator is Frozen UP ThermistorLOW ICE Production Abnormal ICEOthers Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Evacuation and Recharge R-404ABrazing Removal and Replacement of Compressor Important Page Removal and Replacement of Drier Removal and Replacement of Expansion ValveRemoval and Replacement of HOT GAS Valve and Line Valve Page Removal and Replacement of Evaporator Important Page Adjustment of Water Regulating Valve WATER-COOLED Model only Page Removal and Replacement of Thermistor Caution Removal and Replacement of FAN Motor Removal and Replacement of Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes VI. Cleaning and Maintenance Instructions Preparing the Icemaker for Long StoragePage Cleaning and Sanitizing Procedures Cleaning Procedure Page Sanitizing Procedure Maintenance