Hoshizaki KM-630MWH, KM-630MRH, KM-630MAH service manual Troubleshooting Mechanical BIN Control only

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[c]TROUBLESHOOTING (MECHANICAL BIN CONTROL ONLY)

1)Machine will not start

(i)Move dip switch No. 7 to the “OFF” position. If the machine starts up within a few seconds, the bin control is the likely problem. If the machine does not start up, refer to Section “IV. Service Diagnosis” to verify that non-bin control related issues are resolved.

(ii)Check to make sure shipping tape has been removed and the wires are connected properly.

(iii)Check to make sure no obstruction prevents the lever from moving to the bin empty position.

2)Machine will not shut off

(i)Refer to Section “IV. Service Diagnosis” to verify that non-bin control related issues are resolved.

(ii)Dip switch No. 7 should be in the on position. If the switch is in the off position, the controller board will not receive input from the bin control.

(iii)Move the lever to the far right.

a. If the machine does not shut off, check the resistance values of the resistor wire harness. You should read approximately 15.8 Kbetween the black terminal and the red terminal that connect to the K4 connector on the control- ler board, when the lever is in the bin full position (far right). If this reads approximately 7.9 K, the resistors may be miswired. Switch the black and white wires in the terminal housing or order a replacement wire harness.

b. Check the stainless steel bracket that the bin control is mounted to.

c. If the preceding items do not resolve the problem, replace the Bin Control Assembly.

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Contents KM-630MAH KM-630MWH KM-630MRH Hoshizaki AMERICA, INC Contents Maintenance Water TEMP. F Specifications KM-630MAH2a. KM-630MWH Serial #L00001D M20270B 2b. KM-630MWH Serial #M20301E KM-630MRH URC-6F Condenser UnitSpecifications KM-630MAH II. General Information ConstructionKM-630MWH KM-630MRH Controller Board Features of Control Products E Controller BoardController Board SOLID-STATE ControlPage Freeze Cycle Beep every 3 sec. = High Evaporator Temperature 127 FMinute Fill Cycle Harvest CycleControl Products HOS-001A Board Important Water Valve opening is limited to 6 minutes Sequence 1st Cycle2nd Cycle and after with pump drain 2nd Cycle and after with no pump drain For Models with Thermostat Controls and AdjustmentsPage Setting Time Models with Thermostat Checking the Controller Board Models with Mechanical BIN ControlProximity 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 157 Performance DataPressure Drop of Cooling Water Line B1 KM-630MWH Serial #L00001D M20270BB2 KM-630MWH Serial #M20301E 603 Problem Possible Cause Remedy IV. Service Diagnosis 1. no ICE ProductionController Board Problem Possible Cause Remedy Thermistor Evaporator is Frozen UPLOW ICE Production Abnormal ICEOthers Evacuation and Recharge R-404A Removal and Replacement of ComponentsService for Refrigerant Lines Refrigerant RecoveryBrazing Removal and Replacement of Compressor Important Page Removal and Replacement of Expansion Valve Removal and Replacement of DrierRemoval 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 Pump Motor Removal and Replacement of Water ValveRemoval and Replacement of Spray Tubes Preparing the Icemaker for Long Storage VI. Cleaning and Maintenance InstructionsPage Cleaning and Sanitizing Procedures Cleaning Procedure Page Sanitizing Procedure Maintenance