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Hoshizaki service manual Undercounter Refrigerator Model HR24A, Number Issued

Models: HR24A

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HoshizakiHoshizaki America, Inc.

HoshizakiHoshizaki America, Inc.

Undercounter Refrigerator

Model

HR24A

“A Superior Degree

of Reliability”

www.hoshizaki.com

SERVICE MANUAL

Number: 73187

Issued: 12-7-2011

Image 1

Hoshizaki service manual Undercounter Refrigerator Model HR24A, “A Superior Degree of Reliability”, Number Issued

Contents

Undercounter Refrigerator Model HR24A Number Issued“A Superior Degree of Reliability” HoshizakiHoshizaki America, IncHOSHIZAKI AMERICA, INC 618 Highway 74 South Complete and detailed explanation of the problemPeachtree City, GA Attn Hoshizaki Technical Support DepartmentCONTENTS A. Cleaning VI. Cleaning and Maintenance InstructionsB. Maintenance 1. ExteriorImportant Safety Information WARNING, continued B. Storage Capacity and Dimensions I. SpecificationsA. Electrical and Refrigerant Data 1. Storage CapacityUnit mm in 2. Dimensions1. HR24A II. General Information A. ConstructionaRefrigerator B. Sequence of Operation1. Startup 2. Cool Down5. Defrost Initiation 4. Cool Down Restart6. Defrost Termination 7. Energy Saving Mode2. Sequence Flow Chart HR24A Sequence Flow Chart1. Startup 2. Cool DownC. Control Board and Display Module 2. Display Module Layout 1. Control Board LayoutaAdjusting the Temperature Setpoint D. Cabinet Temperatureb Manual Defrost 1. Default SettingsF. Control Panel Lockout E. Display Module Iconsa High and Low Temperature Alarm Values AH or AL G. Alarm Safetiesa Service Menu Access H.Service Menu1Enter Service Menu 2Service Menu Listb Service Menu Chart Service Menu Defrost Do Not AdjustFactory Setting UnitService Menu Temperature Alarm Do Not AdjustFactory Setting UnitEvaporator Fan Motor Do Not Adjust Service Menu Serial Network Do Not AdjustFactory Setting UnitLeft Side Perimeter Liquid Line Condenser Drier III. Technical Data A. Refrigeration CircuitEvaporator Capillary Tube Evaporator Fan Motor Compressor1. HR24A B. Wiring DiagramA.Diagnostic Procedure IV. Service Diagnosis2-min.Comp delay timer starts. Comp icon flashes until 2-min.Comp delay timer terminates. Diagnosis Check that CT LEDs and EvapFM icon turn on. Next, check that EvapFM energizes. If not, confirm that DS is engaged. Check across DS for 5VDC. If 5VDC is not present, check DS activation lever and DS continuity. Note DS contacts are open when DS is engaged. If 5VDC is present, check CB EvapFM connector for 12VDC. If 12VDC is not present, replace CB. If 12VDC is present, check EvapFM wiring connector for loose connection, EvapFM continuity, and fan blade for binding 12Energy Saving Mode Startup and Cool Down B. Control Board Check10Defrost C. Thermistor Check 1.Appliance Not Cooling D. Diagnostic Chart3. Defrost Fails to Start or Terminate 2. Evaporator is Frozen UpEvaporator is Frozen Up - Possible Cause A.Service for Refrigerant Lines V. Replacement of Components1.Refrigerant Recovery 3.Evacuation and Recharge R-134a 2. BrazingB.Important Notes for Component Replacement C. Door Reversal B. Maintenance A. CleaningVI. Cleaning and Maintenance Instructions When shutting down the appliance for more than one week, follow the instructions below VIII. Disposal