Hoshizaki dcm-75ibah service manual DCM-751BH-OS, K2 Connector Drain Valve #10 W/BU

Page 34

2. DCM-751B_H-OS

High-Pressure Switch #3 to #4 (Y) Open-5VDC Closed-0VDC

Control Switch

 

Gear Motor Protect Relay Circuit

#1 to #2 (W/BK)

 

 

#5 to #6 (W/O)

"ICE"-Open-5VDC

 

 

Relay De-Energized-Open-5VDC

"DRAIN"-Closed-0VDC

 

 

Relay Energized-Closed-0VDC

 

 

 

 

K9 Connector

 

 

"SERVICE" Button

 

5VDC

(Ice Purge Cycle Bypass)

 

K8 Connector

 

 

K1 Connector #3 GM (DBU) #2 GM Voltage Input (BR)

K2 Connector Drain Valve #10 (W/BU)

115VAC

 

Transformer

 

24VAC Input

 

#1 (W/R)

24VAC

Transformer

24VAC Neutral

#2 (LBU)

 

Mechanical Bin Control

 

#3 to #4 (GY)

Transformer Input

 

#9 (W/R)

 

Inlet Water Valve

24VAC

#8 (W/BR)

Transformer Input

#7 (W/R)

 

Dispense Water

 

Valve #6 (W/O)

 

24VAC Input

115VAC

#5 (W/R)

#4 (O)

Agitating Motor

 

115VAC Input

 

#3 (BK)

 

Dispense Motor

 

#2 (P)

 

115VAC Input

 

#3 (BK)

 

LED Legend:

AM-agitating motor

COMP-compressor

FLUSH-drain valve

GM-gear motor

ICE-dispense motor

WTRDP-water dispense valve

WTRIN-inlet water valve

 

 

5VDC

Float Switch Output

 

 

#5 (BK)(+)

 

 

Upper Float Switch #6 (R)

 

 

 

 

 

 

Lower Float Switch #7 (DBU)

 

 

 

K7 Connector

 

 

 

Ice OS Sensor GND

 

 

 

#1 (W/R)

 

 

 

Continuous Ice Dispense

 

 

 

Signal #2 (W)

 

 

 

Ice OS Sensor Output

 

 

5VDC

#3 (W/BK)(+)

 

 

Portion Ice Dispense

 

 

 

 

 

 

Signal #5 (W/O)

S1 Dip Switch

"POWER OK" LED

 

Water OS Sensor GND

 

 

 

#7 (R)

 

 

 

Water Dispense Signal

 

 

 

#8 (W)

 

K6 Connector

 

Water OS Sensor

 

 

Output #9 (BK)(+)

 

Open

 

 

5VDC Ground (GND) Terminals

 

 

Fig. 9b

34

Image 34
Contents DCM-751BAH-OS DCM-751BWH-OS Hoshizaki AMERICA, INC Contents Page Important Safety Information Page Construction and Water/Refrigeration Circuit Diagrams DCM-751BAH-OSDCM-751BWH-OS Ice Making Unit Water/Refrigeration Circuit Diagrams Spout Inlet Water Valve Water Supply Float Operation Control Board Sequence Flow Chart DCM-751BH-OSChart 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 Gear Motor Protect Relay Gmpr 5VDC CB K8 Connector See Fig5VDC CB K8 Connector Component Pin # Wire Color Bin Control BC5VDC 0VDC Portion Signal #5 R Red K4 pin closest 5VDC Power Supply #3 W/BK 24VAC CB K2 Connector Connector Pin # Wire Color Neutral LBU Open ClosedBin Control Check Float Switch Check Float Switch Check and CleaningFloat Switch Cleaning Page No Ice Production Diagnostic TablesNo Ice Production Possible Cause Startup No Ice Production Possible Cause ShutdownIce Dispense-Opti-Serve Ice/Water DispensingIce Dispense-Push Button Water Dispense-Push ButtonIII. Controls and Adjustments Control Board Layout DCM-751BHK2 Connector Drain Valve #10 W/BU DCM-751BH-OSIcemaking Sequence Sequence Step LED Lights and Audible Alarm SafetiesNo. of Beeps Type of Alarm Reset Options Every 5 sec Energized Components Min MaxInfrared Sensor Shutdown Delay S1 dip switch 1, 2 Settings and AdjustmentsDefault Dip Switch Settings Drain Frequency Control S1 dip switchBin Control Shutdown Delay S1 dip switch Continuous Dispensing Timer S1 dip switch 5Bin Control Selector S1 dip switch Factory Use S1 Dip Switch 9OFF Power Switch, Control Switch, and Dispense Mode SwitchICE DrainContinuous Dispense Mode SwitchPortion IV. Removal and Replacement of Components Service for Refrigerant LinesBrazing Refrigerant RecoveryEvacuation and Recharge R-404A Important Notes for Component Replacement Evaporator Assembly Components. See FigEvaporator Assembly Icemaking Unit Upper Bearing Wear CheckRemoval and Replacement of Extruding Head Removal and Replacement of AugerRemoval 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 VIII. Technical Information Specification Sheets DCM-751BAHDesign without prior DCM-751BWH Potable Water WATER-COOLED Condenser779 758 Reference without *marks 738 719 Performance Data ICE Production800 363 Wiring Diagrams DCM-751BH-OS