Hoshizaki DCM-750BAH-OS, DCM-750BWH-OS service manual Features, LED Lights

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2. Features

The control board provides the following safeguards:

Provides component protection during low water supply.

Purges remaining ice in the evaporator at startup and shutdown.

Provides short cycle protection for the compressor.

a)LED Lights

The "POWER" LED indicates control voltage and will remain on unless a control voltage problem occurs. An LED illuminates for each relay as it is energized. For more information, see "II.C. Sequence of Operation."

Icemaking

Cycle (Relay)

LED

Energized

 

Time LEDs are

Frequency LEDs are

Components

 

On

On

 

 

 

Fill

POWER only

WV

 

N/A

As Needed

Ice Purge (X1)

GM

GM, HTR

 

60 seconds

N/A

Freeze (X1, X2)

GM, COMP

GM, HTR,

 

N/A

N/A

Comp, FMS

 

 

 

 

 

 

Drain Valve (X6)

FLUSH

DV

 

20 Minutes

Every 12 Hours

 

 

 

 

 

 

 

Dispensing

 

 

Relay

LED

Energized

 

Time LEDs are

Frequency LEDs are

Component

 

On

On

 

 

 

 

Push Button

 

 

 

 

Ice Dispense (X4)

DM

IDM

 

60 seconds

N/A

Opti Serv

 

maximum

 

 

 

 

 

ICE

 

 

 

 

 

 

 

 

 

Every 12 seconds of

Agitating Motors (X3)

AM

AM

 

.6 seconds

accumulative dispense

 

 

 

 

 

time

Water Dispense (X5)

WTR

WTR

 

N/A

N/A

(Opti Serv Only)

 

 

 

 

 

Legend: AM–agitating motors, Comp–compressor; DV–drain valve; FMS–selfcontained fan motor; GM–gear motor; HTR–extruding head heater; IDM–ice dispensing motor, shutter solenoid; WTR–dispensing water valve; WV–inlet water valve

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Contents DCM-750BAH DCM-750BAH-OS DCM-750BWH DCM-750BWH-OS Hoshizaki AMERICA, INC Contents Page DCM-750BAH Specifications IcemakerWater TEMP. F DCM-750BAH-OSPotable Water WATER-COOLED Condenser DCM-750BWHPotable Water Water Cooled Condenser DCM-750BWH-OSII. General Information Construction DCM-750BWH-OS Ice Making Unit Sequence of Operation Startup Control Board Control Board Control Board Layout DCM-750BAH, DCM-750BWHDCM-750BAH-OS, DCM-750BWH-OS LED Lights FeaturesControl Board Check Procedure Controls and Adjustments Portion ControlPower Supply Ice Making ComponentsDispensing Components DCM-750BAH, DCM-750BWH Float Switch Inlet Water Valve DCM-750BWH-OS Wire Color Code Wiring DiagramsDCM-750BAH-OS, DCM-750BWH-OS DCM-750BWH-OS Sequence of Electrical Circuit Ice MakingIce Purge Cycle Orange WHITE/BLACK Pink WHITE/BROWN RED WHITE/BLUE Violet Hour Drain Cycle / Drain Switch Shutdown Low Water Safety High Pressure Switch Continuous Dispense Sequence of Electrical Circuit DispensingPortion Dispense 192 Performance DataApproximate IV. Service Diagnosis Diagnostic Procedure Ice Production Check No Ice Production Diagnostic ChartsProblem Possible Cause Remedy Problem Possible Cause Remedy Low Ice Production Other Dispensing Opti Serve OS Sensors 5c. Water Dispensing 5a. Ice Dispensing Continuous Mode5b. Ice Dispensing Portion Mode Service for Refrigerant Lines Removal and Replacement of ComponentsRefrigerant Recovery BrazingEvacuation and Recharge R-404A Removal and Replacement of Compressor Removal and Replacement of Expansion Valve Removal and Replacement of Evaporator Assembly Components Upper Bearing Wear Check Removal and Replacement of Extruding HeadRemoval and Replacement of Evaporator Removal and Replacement of AugerPage 5b. Lower Housing Removal and Replacement of Gear Motor Page Removal and Replacement of Water-Cooled Condenser Page Removal and Replacement of Fan Motor Adjustment of Water Regulating Valve Water-Cooled Model OnlyRemoval and Replacement of Drain Valve Removal and Replacement of Inlet or Dispensing Water ValveDispensing or Agitating Motor Removal and Replacement of Dispensing SystemDispensing Auger and Agitator Page Cleaning and Sanitizing Instructions VI. Cleaning and MaintenanceWater System Cleaning SolutionDispensing Components Sanitizing SolutionBin Control Bracket Snap Pin Frequency Area Task MaintenancePreparing the Icemaker for Long Storage