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Hoshizaki DCM-750BAH, DCM-750BAH-OS, DCM-750BWH, DCM-750BWH-OS service manual

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Hoshizaki

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models

DCM-750BAH

DCM-750BAH-OS

DCM-750BWH

DCM-750BWH-OS

Cubelet Icemaker / Dispenser

Hoshizaki America, Inc.

Number: 73166

Issued: 10-8-2008

SERVIC E MANUA L

®

Contents

Main Hoshizaki Hoshizaki America, Inc. Page CONTENTS Page I. Specications A. Icemaker 1. DCM-750BAH Note: We reserve the right to make changes in specications and design without prior 2. DCM-750BAH-OS Note: We reserve the right to make changes in specications and design without prior 3. DCM-750BWH 4. DCM-750BWH-OS Note: We reserve the right to make changes in specications and design without prior II. General Information A. Construction Page B. Ice Making Unit C. Sequence of Operation 3 Shutdown & Restart DCM-750BAH(-OS), DCM-750BWH(-OS) Sequence Flow Chart and Component Operation 3. 12 Hour Drain Cycle 2. Shutdown & Restart 1. Startup Power switch "ON" D. Control Board 5 Control Board Part Number A59-0 1. Control Board Layout a) DCM-750BAH, DCM-750BWH 6 b) DCM-750BAH-OS, DCM-750BWH-OS Control Board Part Number A649-0 Page Page Page E. Float Switch III. Technical Information A. Water Circuit and Refrigeration Circuit 1. DCM-750BAH(-OS) 2. DCM-750BWH(-OS) * 3 B. Wiring Diagrams 1. DCM-750BAH, DCM-750BWH 4 2. DCM-750BAH-OS, DCM-750BWH-OS WIRE COLOR CODE * C. Sequence of Electrical Circuit Ice Making Page Page Page Page Page Page D. Sequence of Electrical Circuit Dispensing Page E. Performance Data 1. DCM-750BAH(-OS) 2. DCM-750BWH(-OS) IV. Service Diagnosis A. Diagnostic Procedure B. Ice Production Check C. Diagnostic Charts 1. No Ice Production Page Page 4 2. Low Ice Production 4 3. Other 4. Dispensing Page 5a. Ice Dispensing "Continuous" Mode 5b. Ice Dispensing "Portion" Mode 5c. Water Dispensing V. Removal and Replacement of Components A. Service for Refrigerant Lines Page B. Removal and Replacement of Compressor C. Removal and Replacement of Expansion Valve Fig. 1 D. Removal and Replacement of Evaporator Assembly Components Fig. 2 Page Page Page Fig. 3 E. Removal and Replacement of Self-Contained Air-Cooled Condenser F. Removal and Replacement of Water-Cooled Condenser G. Removal and Replacement of Water Regulating Valve - Water-Cooled Model Only H. Adjustment of Water Regulating Valve - Water-Cooled Model Only Fig. 4 I. Removal and Replacement of Fan Motor J. Removal and Replacement of Inlet or Dispensing Water Valve K. Removal and Replacement of Drain Valve L. Removal and Replacement of Dispensing System Fig. 5 VI. Cleaning and Maintenance A. Cleaning and Sanitizing Instructions Fig. 6 Page Page Fig. 7 Fig. 8 B. Maintenance C. Preparing the Icemaker for Long Storage