Hoshizaki KM-501MAH, KM-501MRH, KM-501MWH

*1 The pump motor waits for 2 seconds before starting a pump-out drain cycle. See "II.C.3.

Controls and Adjustments."

*2 The icemaker does not complete a harvest cycle in the ﬁrst 2 or 3 minutes. See "II.C.3.

Controls and Adjustments."

Contents

Main Hoshizaki Hoshizaki America, Inc. Page CONTENTS Page I. Specications A. Icemaker 1. KM-501MAH (air-cooled) Note: We reserve the right to make changes in specications and design without prior 2. KM-501MWH (water-cooled) Note: We reserve the right to make changes in specications and design without prior 3. KM-501MRH (remote air-cooled) Note: We reserve the right to make changes in specications and design without prior B. Condensing Unit 1. URC-6F SPECIFICATIONS MODEL: URC-6F II. General Information A. Construction Page Page B. Sequence of Operation KM-501MAH, KM-501MWH, KM-501MRH Sequence Flow Chart and Component Operation 4. Pump-Out Cycle Steps 2. Harvest Cycle 3. Freeze Cycle Fill Cycle C. Control Board Control Products "E" Control Board Control Board Part Number 2A1410-01 (factory); 2A1410-02 (service) Type HOS-001A (Control Products - 10 Pin) 1. Control Board Layout Page Page Page Page Page Page Page Page Page Page Page Page Page 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold 2. We reserve the right to make changes in specications and design without prior D. Performance Data 1. KM-501MAH (air-cooled) 2. KM-501MWH (water-cooled) 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold 2. We reserve the right to make changes in specications and design without prior 3. KM-501MRH (remote air-cooled) 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold 2. We reserve the right to make changes in specications and design without prior IV. Service Diagnosis A. 10-Minute KM Diagnostic Procedure B. Diagnostic Charts Page Page Page 2. Evaporator is Frozen Up 3. Low Ice Production 4. Abnormal Ice 5. Other Page V. Removal and Replacement of Components A. Service for Refrigerant Lines B. Brazing DANGER C. Removal and Replacement of Compressor D. Removal and Replacement of Drier E. Removal and Replacement of Expansion Valve WARNING F. Removal and Replacement of Hot Gas Valve and Line Valve 2. G. Removal and Replacement of Evaporator H. Removal and Replacement of Water Regulating Valve - Water Cooled Model Only I. Adjustment of Water Regulating Valve - Water-Cooled Model Only Fig. 1 K. Removal and Replacement of Thermistor Fig. 2 L. Removal and Replacement of Fan Motor M. Removal and Replacement of Inlet Water Valve N. Removal and Replacement of Pump Motor O. Removal and Replacement of Spray Tubes Page Fig. 4 B. Maintenance C. Preparing the Icemaker for Long Storage WARNING Fig. 5