Hoshizaki dcm-75ibah Construction and Water/Refrigeration Circuit Diagrams, DCM-751BAH-OS

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I. Construction and Water/Refrigeration Circuit Diagrams

A. Construction

1. DCM-751BAH(-OS)

Control Box

Power Switch

Agitating Motor (L)

CONTROL	4A1038-014
CONTROL
ICE
OFF	DISPENSE MODE
	PORTION
DRAIN	CONTINUOUS
	CONTINUOUS

Spout B

Storage Bin

Bin Control Switch

Agitator (L)

Agitator (R)

Dispense Auger

Agitating Motor (R)

Dispensing Motor

Compressor

Spout A

Inlet Water Valve

Float Switch

Evaporator Assembly

Reservoir

Thermostatic Expansion Valve

Gear Motor	Dispense Water Valve

Air-Cooled Condenser

Drain Valve

Shutter Assembly

Spout Cover

Safety Switch (Door)

7

Image 7

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 Diagnosis Control Board Sequence Flow Chart DCM-751BH-OSChart OperationDiagnostic 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 Bin Control BC 5VDC CB K8 Connector See Fig5VDC CB K8 Connector Component Pin # Wire Color Gear Motor Protect Relay Gmpr5VDC 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 CauseWater Dispense-Push Button Ice/Water DispensingIce Dispense-Push Button Ice Dispense-Opti-ServeIII. Controls and Adjustments DCM-751BH Control Board LayoutDCM-751BH-OS K2 Connector Drain Valve #10 W/BUEnergized Components Min Max LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Reset Options Every 5 sec Icemaking Sequence Sequence StepDrain Frequency Control S1 dip switch Settings and AdjustmentsDefault Dip Switch Settings Infrared Sensor Shutdown Delay S1 dip switch 1, 2Factory Use S1 Dip Switch 9 Continuous Dispensing Timer S1 dip switch 5Bin Control Selector S1 dip switch Bin Control Shutdown Delay S1 dip switchDrain Power Switch, Control Switch, and Dispense Mode SwitchICE OFFContinuous 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