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Hoshizaki KM-520MAJ Service Manual

Hoshizaki KM-520MAJ
89 pages
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Models
KM-350MAJ, MWJ
KM-420MAJ, MWJ, MRJZ
KM-520MAJ, MWJ, MRJ(Z)
KM-660MAJ, MWJ, MRJ(Z)
Modular Crescent Cuber
Service Manual
Number: 73230
Issued: 10-29-2018
Revised: 11-7-2023
hoshizakiamerica.com

Table of Contents

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Hoshizaki KM-520MAJ Specifications

General IconGeneral
ModelKM-520MAJ
Ice TypeCrescent Cube
RefrigerantR-404A
CondenserAir-Cooled
Voltage115V
TypeCube Ice Maker
Production Capacity520 lbs/24 hours
Power Supply115V, 60Hz, 1Ph
Storage CapacityNot applicable (modular unit)
Water SupplyPotable Water Supply

Summary

Important Safety Information

Construction and Circuit Diagrams

Construction Details

Details the physical assembly of different icemaker models (Air-Cooled, Water-Cooled, Remote).

Water and Refrigeration Circuit Diagrams

Illustrates the flow of water and refrigerant for different model types.

Operation Sequence and Service Diagnosis

Sequence of Operation Flow Charts

Visualizes the operational steps and flow of the icemaker cycles.

Service Diagnosis Procedures

Provides troubleshooting steps for control boards and model-specific diagnostics.

Control Board and Bin Control Checks

Procedures for checking control boards, bin control, float switches, and thermistors.

Diagnostic Tables and Freeze-Up Checklist

Lists common problems, causes, and a checklist for diagnosing freeze-ups.

Controls and Adjustments

Control Board Layouts

Details the physical layout and connection points of the control boards.

LED Indicators and Audible Alarms

Explains the meaning of control board LEDs and audible alarm signals.

Dip Switch Settings and Adjustments

Covers configuration of dip switches for various operational parameters and timings.

Refrigeration Circuit and Component Service

Refrigerant Handling and Circuit Service

Procedures for refrigerant recovery, brazing, leak detection, and component replacement.

Water Regulating Valve Adjustment

Procedure for adjusting the water regulating valve on water-cooled units.

Maintenance Schedule

Routine Maintenance Tasks

Provides a schedule for regular cleaning and inspection tasks.

Preparing for Non-Use and Storage

Water Removal Procedures

Steps to drain water lines and tanks for extended non-use or freezing temperatures.

Appliance Disposal Guidelines

Technical Specifications and Performance Data

Model Specifications and Performance Data

Detailed specifications and performance data for various KM series models.

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