Hoshizaki 73168 service manual Refrigeration Circuit VI. Technical Information, HPR100A-D

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62

Front

Defrost Thermostat

Cabinet Thermistor

Cabinet Fans

Rail Fans

Rail Evaporator

Rail Thermistor

		Condenser
Control Box
	Cabinet	Condenser Fan
	Expansion		Drier
	Valve		Drier
	Valve	Receiver
		Receiver		High Pressure
		Tank		High Pressure
		Tank		Switch
Defrost				Switch
Defrost
Thermistor
	Cabinet			Cabinet
Cabinet	Cabinet			Condensate
Cabinet	Liquid			Condensate
Evaporator	Liquid			Drain Pan
Evaporator	Line			Drain Pan
	Line
	Valve	Receiver Service Valve
		Receiver Service Valve
Rail Low‑Side		Compressor Access Valve
Service Valve		Compressor Access Valve
Service Valve
		Rail High‑Side
		Service Valve
Rail		Rail High-Side
Rail		Access Valve
Disconnects		Access Valve
Disconnects
		Rail Liquid
Rail Low-Side		Line Valve	Compressor
Rail Low-Side
Access Valve	Rail Expansion Valve

1. HPR46A(-D), HPR72A(-D),	A. Refrigeration Circuit	VI. Technical Information
HPR100A(-D)

Note: The number of rail fans varies between models.

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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 Sequence of Operation Power Switch ON, Rail Cooling Switch OFFPower Switch ON, Rail Cooling Switch Normal or LOW 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 ProtectionTemperature Display Controls and AdjustmentsSwitch Settings Cabinet Defrost Temperature SetpointEnergy Saving Mode Temperature Correction Factor Service Menu Service Menu AccessService Menu Chart Control Board Replacement Alarm SignalsControl Board Check Procedure Compressor Protector Thermistor CheckPerimeter Heater 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 5a. Secondary Defrost Thermistor Rail, not used Defrost Thermistor cabinet Malfunction Alarm E8Possible Causes Condenser Thermistor Malfunction Alarm E9 No Operation Service ChartControl Board Alarms EA and ED Cabinet Cooling Problem Possible Cause Remedy Rail Cooling Cabinet Defrost Other Refrigerant Recovery IV. Removal and Replacement of ComponentsService for Refrigerant Lines 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 Defrost Thermistor Removal and Replacement of Thermistors and ThermostatCabinet 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