Hoshizaki KM-630MWH, KM-630MRH, KM-630MAH Removal and Replacement of Compressor Important

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3.REMOVAL AND REPLACEMENT OF COMPRESSOR IMPORTANT

Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repair or replacement has been made.

Note: When replacing a Compressor with a defective winding, be sure to install the new Start Capacitor and Start Relay supplied with the replacement Compressor. Due to the ability of the POE oil in the compressor to absorb moisture quickly, the Compressor must not be opened more than 15 minutes for replacement or service. Do not mix lubricants of different compressors even if both are charged with R-404A, except when they use the same lubricant.

1)Turn off the power supply.

2)Remove the panels.

3)Recover the refrigerant and store it in an approved container.

4)Remove the Terminal Cover on the Compressor, and disconnect the Compressor Wiring.

5)Remove the Discharge and Suction Pipes using brazing equipment.

6)Remove the Hold-down Bolts, Washers and Rubber Grommets.

7)Slide and remove the Compressor. Unpack the new Compressor package. Install the new Compressor.

8)Attach the Rubber Grommets of the prior Compressor.

9)Sandpaper the Suction, Discharge and Process Pipes.

10)Place the Compressor in position, and secure it using the Bolts and Washers.

11)Remove plugs from the Suction, Discharge and Process Pipes.

12)Braze the Process, Suction and Discharge lines (Do not change this order), while purging with nitrogen gas flowing at the pressure 3 - 4 PSIG.

13)Install the new Filter Drier.

14)Check for leaks using nitrogen gas (140 PSIG) and soap bubbles.

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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