Hoshizaki dcm-75ibah service manual DCM-751BAH-OS DCM-751BWH-OS

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HoshizakiHoshizaki America, Inc.

Cubelet Icemaker/Dispenser

Models

DCM-751BAH(-OS)

DCM-751BWH(-OS)

“A Superior Degree

of Reliability”

www.hoshizaki.com

SERVICE MANUAL

Number: 73184

Issued: 8-31-2012

Revised: 9-24-2014

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Contents DCM-751BAH-OS DCM-751BWH-OS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page DCM-751BAH-OS Construction and Water/Refrigeration Circuit DiagramsDCM-751BWH-OS Ice Making Unit Water/Refrigeration Circuit Diagrams Spout Inlet Water Valve Water Supply Float Chart Control Board Sequence Flow Chart DCM-751BH-OSOperation DiagnosisDiagnostic Procedure Service DiagnosisIce Production Check Page Page Page Page Control Board Check High-Pressure Switch HPS 5VDC CB K9 Connector See Fig5VDC CB K9 Connector Component Pin # Wire Color 5VDC CB K8 Connector Component Pin # Wire Color 5VDC CB K8 Connector See FigGear Motor Protect Relay Gmpr Bin Control BC5VDC 0VDC Portion Signal #5 R Red K4 pin closest 5VDC Power Supply #3 W/BK Connector Pin # Wire Color Neutral LBU Open Closed 24VAC CB K2 ConnectorBin Control Check Float Switch Check Float Switch Check and CleaningFloat Switch Cleaning Page No Ice Production Diagnostic TablesNo Ice Production Possible Cause Startup Shutdown No Ice Production Possible CauseIce Dispense-Push Button Ice/Water DispensingIce Dispense-Opti-Serve Water Dispense-Push ButtonIII. Controls and Adjustments DCM-751BH Control Board LayoutDCM-751BH-OS K2 Connector Drain Valve #10 W/BUNo. of Beeps Type of Alarm Reset Options Every 5 sec LED Lights and Audible Alarm SafetiesIcemaking Sequence Sequence Step Energized Components Min MaxDefault Dip Switch Settings Settings and AdjustmentsInfrared Sensor Shutdown Delay S1 dip switch 1, 2 Drain Frequency Control S1 dip switchBin Control Selector S1 dip switch Continuous Dispensing Timer S1 dip switch 5Bin Control Shutdown Delay S1 dip switch Factory Use S1 Dip Switch 9ICE Power Switch, Control Switch, and Dispense Mode SwitchOFF DrainContinuous Dispense Mode SwitchPortion Service for Refrigerant Lines IV. Removal and Replacement of ComponentsBrazing Refrigerant RecoveryEvacuation and Recharge R-404A Evaporator Assembly Components. See Fig Important Notes for Component ReplacementEvaporator Assembly Upper Bearing Wear Check Icemaking UnitRemoval and Replacement of Auger Removal and Replacement of Extruding HeadRemoval and Replacement of Evaporator 5b. Lower Housing Removal and Replacement of Gear Motor Dispense Auger and Agitator Dispense ComponentsDispense and Agitating Motors Maintenance Schedule MaintenanceFrequency Area Task VI. Preparing the Appliance for Periods of Non-Use Page VII. Disposal DCM-751BAH VIII. Technical Information Specification SheetsDesign without prior Potable Water WATER-COOLED Condenser DCM-751BWH779 758 Reference without *marks 738 719 ICE Production Performance Data800 363 Wiring Diagrams DCM-751BH-OS