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Hoshizaki 73183 service manual III. Technical Data A. Refrigeration Circuit

Models: 73183

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III. Technical Data

A. Refrigeration Circuit

Condenser

Condenser Fan

High-Pressure Switch

Expansion Valve

Drier

High-Side

Access Valve

Condensate Pump

Condensate Pan

Low-Side

Access

Valve

Compressor

Evaporator Fans	Defrost
(2 or 3 depending on model)	Thermistor	Evaporator
		Evaporator

Cabinet Thermistor

Defrost Heater and Defrost Thermostat

(freezer only)

Reservoir

Condensate Pump Float Switch

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Hoshizaki 73183 service manual III. Technical Data A. Refrigeration Circuit

Contents

Commercial Series Refrigerated Kitchen Equipment Models Reach-In B-SeriesHoshizakiHoshizaki America, Inc HOSHIZAKI AMERICA, INC 618 Highway 74 South Peachtree City, GA Complete and detailed explanation of the problemAttn Hoshizaki Technical Support Department Phone 1-800-233-1940 Technical Support 770 487-2331 FaxCONTENTS V. Replacement of Components D. Diagnostic ChartA. Service for Refrigerant Lines 1. Refrigerant RecoveryIndicates a hazardous situation which could result in death or Important Safety Informationserious injury Indicates a situation which could result in damage to the unitPage I. Specifications A. Nameplate Ratings B. Dimensions1. Refrigerated Volume and Shelf Space Unit mm in 2. One Section/Two Section/Three Section1. One Section II. General Information A. Construction2. Two Section Model Shown CR3B-FS Models 3. Three Section1. Sequence Cycles and Shutdown B. Sequence of Operationa Refrigerator 1. Startup/Cool Down1. Startup/Cool Down b Freezer2. Cool Down Achieved 3. Cool Down RestartCharts Refrigerator Sequence Flow Charta Refrigerator 2. Sequence Flowb Freezer Freezer Sequence Flow Chart1. Startup/Cool Down 2. Cool Down Achieved1. Display Module Layout Display Module C. Display Modulea Default Settings 2. Controls and Adjustmentsb Temperature Setpoint c Changing the Temperature Display Scale F or CRefrigerator Control Module D. Control ModuleFreezer Control Module 1. Control Module LayoutAlarm Signals 2. Alarm SafetiesAlarm Code ProblemF. Mullion/Perimeter Heater 3. High-Pressure SwitchG. Thermistors 1. Compressor External or Internal OverloadIII. Technical Data A. Refrigeration Circuit B. Wiring Diagrams High-Pressure Switch1. CR1B-FS/HS, CR3B-FS/HS 2. CR2B-FS/HS, CR3B-FS/HS High-Pressure SwitchHigh-Pressure Switch 3. CF1B-FS/HS, CF3B-FS/HSDefrost Thermostat High-Pressure Switch 4. CF2B-FS/HS, CF3B-FS/HSDefrost Thermostat 6. CF3B-FS/HS Receptacle Box Connection 5. CR3B-FS/HS Receptacle Box ConnectionNote Only the top receptacles have power Note Only the top receptacles have powerA. Diagnostic Procedure IV. Service Diagnosis1. Refrigerator Defrost Diagnosis 9 Defrost2. Freezer Defrost Diagnosis 9 DefrostPage B. Control Module Check Startup/Cool DownDefrost C. Thermistor Check 1. Unit Not Cooling D. Diagnostic Chart3. Defrost Fails to Terminate 2. Evaporator is Frozen UpUnit Not Cooling - Possible Cause Evaporator is Frozen Up - Possible CauseV. Replacement of Components A. Service for Refrigerant Lines1. Refrigerant Recovery 3. Evacuation and Recharge 2. Brazing4 Close the low-side valve and high-side valve on the gauge manifold C. Door Re-Hinging B. Important Notes for Component Replacementcomponents ground wire ComponentB. Maintenance A. Cleaning2. Power Supply Connection 1. ExteriorC. Shutdown and Long Storage