Hoshizaki 73168 service manual Important Safety Information, Serious injury, Unit

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Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit.

WARNING

Indicates a hazardous situation which could result in death or

 

serious injury.

CAUTION

Indicates a situation which could result in damage to the unit.

IMPORTANT

Indicates important information about the use and care of the

 

unit.

WARNING

This unit should be destined only to the use for which it has been expressly conceived. Any other use should be considered improper and therefore dangerous. The manufacturer cannot be held responsible for eventual damage caused by improper, incorrect, and unreasonable use.

To reduce the risk of death, electric shock, serious injury, or fire, follow basic precautions including the following:

This unit requires an independent power supply. See the nameplate for proper voltage and breaker/fuse size. Failure to use a proper breaker or fuse can result in a tripped breaker, blown fuse, or damage to existing wiring. This could lead to heat generation or fire.

THIS APPLIANCE MUST BE GROUNDED: This unit is equipped with a

3prong grounding plug to reduce the risk of potential shock hazards. It must be plugged into a properly grounded, independent 3-prong wall outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have a qualified electrician replace it with a properly grounded, independent 3-prong wall outlet. Do not remove the ground prong from the power cord and do not use an adapter plug.

Do not use an extension cord.

Make sure the power switch is in the "OFF" position before plugging in or unplugging the unit to reduce the risk of electric shock.

Do not use a unit with a damaged power cord. The power cord should not be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions could result in electric shock or fire. To unplug the unit, be sure to pull the plug, not the cord, and do not jerk the cord.

To reduce the risk of electric shock, do not touch the plug or power switch with damp hands.

This unit should be disassembled or repaired only by qualified service personnel to reduce the risk of electric shock, injury, or fire.

Do not make any alterations to the unit. Alterations could result in electric shock, injury, fire, or damage to the unit.

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Contents Superior Degree Reliability Number Issued Revised Hoshizaki AMERICA, INC Contents Page Page Indicates important information about the use and care Important Safety InformationSerious injury UnitSpecifications Nameplate Ratings DimensionsII. General Information Construction Power Switch ON, Rail Cooling Switch OFF Power Switch ON, Rail Cooling Switch Normal or LOWSequence of Operation Cool Down Restart Cabinet DefrostCabinet Defrost Power Switch ON, Rail Cooling Switch OFF Rail DefrostPower Switch ON, Rail Cooling Switch OFF Cabinet OperationPower Switch ON, Rail Cooling Switch Normal or LOW Position Rail CoolingCabinet and Rail Cooling Control Board Control Board LocationFront Rear Control Board LayoutService Menu LED Display and Service Lock-OutAlarm Signal Compressor Short Cycle ProtectionControls and Adjustments Switch SettingsTemperature Display Temperature Setpoint Energy Saving ModeCabinet Defrost Temperature Correction Factor Service Menu Service Menu AccessService Menu Chart Alarm Signals Control Board Check ProcedureControl Board Replacement Thermistor Check Perimeter HeaterCompressor Protector III. Service Diagnosis Alarm SignalsAlarm Priority Problem Reset, Corrections, and Adjustments High Temperature Alarm E1 Reset OptionsLow Temperature Alarm E2 Cabinet Defrost Alarm E3 High Condenser Temperature Alarm clogged filter E7 Defrost Thermistor cabinet Malfunction Alarm E8 Possible Causes5a. Secondary Defrost Thermistor Rail, not used Condenser Thermistor Malfunction Alarm E9 Service Chart Control Board Alarms EA and EDNo Operation Cabinet Cooling Problem Possible Cause Remedy Rail Cooling Cabinet Defrost Other IV. Removal and Replacement of Components Service for Refrigerant LinesRefrigerant Recovery Brazing Evacuation and Recharge R-404APage Removal and Replacement of Refrigeration System Cartridge Refrigerant Recovery ProcedurePage Refrigeration System Pump‑Down Procedure Page Defrost Thermistor Rail Thermistor Removal and Replacement of Compressor Removal and Replacement of Cabinet Evaporator Removal and Replacement of Expansion Valve Removal and Replacement of Liquid Line Valve Removal and Replacement of Condenser Removal and Replacement of Thermistors and Thermostat Cabinet ThermistorDefrost Thermistor Defrost Thermostat Rail ThermistorRemoval and Replacement of Defrost Heater Condenser Thermistor clogged filterRemoval and Replacement of Fan Motors Cabinet Fan MotorCondenser Fan Motor Rail Fan MotorRemoval and Replacement of Door Gasket Door Re-Hinging and Drawer ConversionCleaning and Maintenance Instructions Work SurfaceCabinet Interior Rail and Rail CoverExterior Door/Drawer GasketsRail Condensate Pan MaintenancePower Supply Connection Air FilterShutdown and Long Storage Refrigeration Circuit VI. Technical Information HPR100A-DWiring Diagrams HPR46A-D2a. HPR72A-D Auxiliary Code U-5 and Earlier 2b. HPR72A-D Auxiliary Code U-6 and Later Awaiting Data