Hoshizaki dcm-75ibah service manual Bin Control Check

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D. Bin Control Check

When the actuator paddle is not engaged, BC is closed and the appliance produces ice. S1 dip switch 7 must be in the "OFF" position. When ice fills the chute and engages the actuator paddle, BC opens and CB shuts down the appliance within 10 seconds.

NOTICE! Do not place S1 dip switch 7 in the "ON" position. For details, see "III.C.1. Default Dip Switch Settings."

1)Remove the front and top panels.

2)Remove the storage bin cover. If necessary, dispense ice or remove ice manually so that the BC actuator paddle is not engaged.

IMPORTANT! Appliance will not start unless the safety switch is engaged. WARNING! Keep hands, hair, and loose clothing clear of the agitator rotating inside of the storage bin.

3)Move the control switch to the "OFF" position.

4)Move the power switch to the "OFF" position.

5)Turn off the power supply.

6)Disconnect BC connector from the back of the control box.

7)Check for continuity across BC proximity switch. If BC actuator is not engaged and BC proximity switch is open, replace BC proximity switch.

8)Press and hold BC actuator paddle. While BC actuator is engaged, check for continuity across BC proximity switch. If BC actuator is engaged and BC proximity switch is open, replace BC proximity switch.

9)Disengage BC actuator paddle.

10)Reconnect BC connector. Remove the control box cover.

11)Turn on the power supply. Move the power switch to the "ON" position.

12)Move the control switch to the "ICE" position.

13)Engage the safety switch to start the automatic icemaking process.

14)Make sure the "GM" LED is on. There is a delay of at least 5 seconds before the "GM" LED turns on after powerup. After the "GM" LED turns on, press the "SERVICE" button on CB to bypass the 5-minute compressor delay. WARNING! Risk of electric shock. Care should be taken not to touch live terminals. The "COMP" LED turns on.

15)When Comp starts, press and hold BC actuator paddle.

16)Comp and GM should deenergize within 10 seconds. Diagnosis: If not, and BC is found open and the appliance continues to run, replace CB.

17)Move the power switch to the "OFF" position and turn off the power supply.

18)Move the power switch to the "ON" position.

19)Replace the storage bin cover, control box cover, top panel, and front panel in their correct positions.

20)Turn on the power supply to start the automatic icemaking process.

Legend: BC–bin control; CB–control board; Comp–compressor; GM–gear motor

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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 DiagnosisIce Production Check Service DiagnosisDiagnostic Procedure Page Page Page Page Control Board Check 5VDC CB K9 Connector Component Pin # Wire Color 5VDC CB K9 Connector See FigHigh-Pressure Switch HPS 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 Cleaning Float Switch Check and CleaningFloat Switch Check Page No Ice Production Possible Cause Startup Diagnostic TablesNo Ice Production 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 DrainPortion Dispense Mode SwitchContinuous IV. Removal and Replacement of Components Service for Refrigerant LinesEvacuation and Recharge R-404A Refrigerant RecoveryBrazing 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 and Agitating Motors Dispense ComponentsDispense Auger and Agitator Frequency Area Task MaintenanceMaintenance Schedule 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