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Hoshizaki KM-500MWH User Manual

Hoshizaki KM-500MWH
67 pages
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SERVICE MANUAL
ISSUED:
NOV. 7, 2002
KM-500MAH
KM-500MWH
KM-500MRH
MODULAR CRESCENT CUBER
Reliability is a
beautiful thing
TM
REVISED:
DEC. 16, 2003
NUMBER:
73104

Table of Contents

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Hoshizaki KM-500MWH Specifications

General IconGeneral
TypeModular
Ice Production500 lbs/24 hrs
CondenserAir-cooled
Width30 inches
RefrigerantR-404A
Weight220 lbs
Water SupplyPotable water connection required
Voltage115V/60Hz/1Ph

Summary

HOSHIZAKI Icemaker Specifications

KM-500MAH Specifications

Detailed specifications for the KM-500MAH model, including electrical and physical data.

KM-500MWH Specifications

Detailed specifications for the KM-500MWH model, including water-cooled condenser data.

KM-500MRH Specifications

Detailed specifications for the KM-500MRH model, including remote air-cooled condenser data.

Condenser Unit URC-6F Specifications

Specifications for the URC-6F condenser unit used with remote models.

HOSHIZAKI Icemaker General Information

Unit Construction Overview

Diagrams illustrating the internal construction of KM-500MAH, KM-500MWH, and KM-500MRH models.

Controller Board Functionality

Explains solid-state control, safety features, and LED indicators on the controller board.

Operating Sequences

Details the 1st cycle, 2nd cycle with/without pump drain, and their operational flow.

Controls and Adjustments

Configuration of dip switches for defrost, drain, and freeze timers, and bin control settings.

Checking the Controller Board

Procedures for testing the controller board's functionality and sequence.

Mechanical Bin Control Operation

Explains proximity switch operation, troubleshooting, and settings for mechanical bin control.

HOSHIZAKI Icemaker Technical Information

Water and Refrigerant Circuits

Visual representations of water and refrigerant flow for KM-500MAH, KM-500MWH, and KM-500MRH.

Wiring Diagrams and Pressure Settings

Electrical wiring schematics and pressure cut-in/cut-out values for different models.

Timing Chart for Operation Cycles

Graphical representation of component timing during various ice-making cycles.

Performance Data Tables

Data on ice production, consumption, cycle times, and pressures under various conditions.

HOSHIZAKI Icemaker Service Diagnosis

No Ice Production Troubleshooting

Identifies causes and remedies for the icemaker failing to produce ice.

Evaporator Frozen Up Troubleshooting

Diagnoses and resolves issues related to the evaporator freezing.

Low Ice Production Troubleshooting

Addresses causes and solutions for reduced ice output.

Abnormal Ice and Other Issues

Covers diagnosing abnormal ice shapes and other operational problems.

HOSHIZAKI Icemaker Component Removal and Replacement

Refrigerant Lines Service

Procedures for refrigerant recovery, evacuation, and recharging.

Brazing Procedures

Safety precautions and techniques for brazing refrigerant lines.

Compressor Replacement

Step-by-step guide for removing and installing the compressor.

Drier Replacement

Instructions for replacing the refrigerant filter drier.

Expansion Valve Replacement

Guide for removing and installing the expansion valve.

Hot Gas Valve and Line Valve Replacement

Steps for replacing hot gas and line valves.

Evaporator Replacement

Procedure for removing and installing the evaporator.

Water Regulating Valve Replacement (Water-Cooled)

Instructions for replacing the water regulating valve on water-cooled models.

Water Regulating Valve Adjustment (Water-Cooled)

How to adjust the water regulating valve for water-cooled models.

Condensing Pressure Regulator Replacement (Remote Air-Cooled)

Guide for replacing the CPR on remote air-cooled models.

Thermistor Replacement

Steps for removing and installing the thermistor sensor.

Fan Motor Replacement

Instructions for replacing the fan motor.

Water Valve Replacement

Procedure for replacing the water valve.

Pump Motor Replacement

Steps for removing and installing the pump motor.

Spray Tubes Replacement

Guide for replacing the spray tubes.

HOSHIZAKI Icemaker Cleaning and Maintenance

Preparing Icemaker for Long Storage

Procedures for draining and preparing the unit for extended periods of non-use.

Unit Cleaning Procedures

Detailed steps for cleaning the icemaker, including solution preparation and execution.

Unit Sanitizing Procedures

Steps for sanitizing the icemaker after cleaning, using a hypochlorite solution.

Routine Maintenance

Guidelines for maintaining stainless steel exterior, storage bin, and condenser.

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