Hoshizaki 73168 service manual II. General Information Construction

Page 8

II. General Information

A. Construction

This Hoshizaki unit features a cartridge-type refrigeration system that can be removed (excluding the rail evaporator).

Rail Cover

Rail Fan Motors and

Fan Shrouds

Compressor

Side Panel

Front Panel

Receiver Tank	Air Filter
	Air Filter
Drier	Control Box
	Control Box
Condenser Fan Motor
Wire Cover	Condenser
Cabinet Evaporator	Cabinet Evaporator
Fan Motors	Assembly
Fan Motors

Cabinet Defrost Thermistor

Refrigeration

Cartridge

Defrost Thermostat	Cabinet Thermistor
	Cabinet Air Duct

Cabinet Interior Side

Panel

8

Image 8

Contents Superior Degree Reliability Number Issued Revised Hoshizaki AMERICA, INC Contents Page Page Important Safety Information Serious injuryIndicates important information about the use and care 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 LayoutLED Display and Service Lock-Out Alarm SignalService Menu 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 SurfaceRail and Rail Cover ExteriorCabinet Interior Door/Drawer GasketsMaintenance Power Supply ConnectionRail Condensate Pan 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