Hoshizaki DKM-500BAH service manual Hoshizaki AMERICA, INC

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IMPORTANT

Only qualiﬁed service technicians should attempt to service or maintain this unit. No such service or maintenance should be undertaken until the technician has thoroughly read this Service Manual.

HOSHIZAKI provides this manual primarily to assist qualiﬁed service technicians in the service and maintenance of the unit.

Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write or send an e-mail message to the HOSHIZAKI Technical Support Department for assistance.

HOSHIZAKI AMERICA, INC.

618 Highway 74 South

Peachtree City, GA 30269

Attn: HOSHIZAKI Technical Support Department

Phone: 1-800-233-1940 Technical Service

(770)487-2331 Fax: 1-800-843-1056

(770)487-3360

E-mail: techsupport@hoshizaki.com

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the following information:

•Model Number

•Serial Number

•Complete and detailed explanation of the problem

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Contents

DKM-500BAH Hoshizaki AMERICA, INC Contents Page Speciﬁcations DKM-500BAHII. General Information Construction DKM-500BAHSequence of Operation DKM-500BAH Sequence Flow Chart and Component Operation CycleControl Board Control Board Control Products E Control BoardControl Board Layout Low Water Safety Harvest Backup Timer and Freeze TimerHigh Temperature Safety Maximum Water Supply Period 6 minutesLED Lights and Audible Alarm Safeties PM, SR, DVHarvest Control Thermistor Controls and AdjustmentsDefault Dip Switch Settings Harvest Timer dip switch 1 Pump-Out Timer dip switch 3Bin Control Pump-Out Frequency Control dip switch 5Freeze Timer dip switch 9 Machine Will Not Start Bin Control TroubleshootingControl Board Check Procedure Machine Will Not Shut OffControl Switch SwitchesControl Board Replacement Service SwitchCirculate WashDKM-500BAH Wiring Diagram Timing Chart Page Performance Data 110IV. Service Diagnosis Minute Diagnostic Procedure No Ice Production Diagnostic ChartsIce Making Problem Possible Cause Remedy Problem Possible Cause Remedy Evaporator is Frozen Up Low Ice Production Abnormal IceOther DispensingProblem Possible Cause Remedy Refrigerant Recovery Removal and Replacement of ComponentsService for Refrigerant Lines Evacuation and Recharge R-404ARemoval and Replacement of Compressor BrazingRemoval and Replacement of Drier Removal and Replacement of Expansion Valve Removal and Replacement of Hot Gas ValveRemoval and Replacement of Evaporator Removal and Replacement of Condenser Removal and Replacement of Thermistor Removal and Replacement of Fan MotorRemoval and Replacement of Inlet Water Valve Removal and Replacement of Pump MotorRemoval and Replacement of Spray Tubes Removal and Replacement of Gear MotorRemoval and Replacement of Dispense Switch Removal and Replacement of SolenoidCleaning Procedure Icemaker VI. Cleaning and Maintenance InstructionsCleaning Instructions Sanitizing Procedure Icemaker Cleaning Procedure Bin Sanitizing Procedure BinExterior Panels Maintenance InstructionsPreparing the Icemaker for Long Storage Air Filters