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Scotsman MXG 438 A/W - User Manual

Scotsman MXG 438 A/W
199 pages
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TECHNICAL SERVICE TRAINING
Welcome to another Scotsman technical service presentation
This one will cover the electronic MXG series Ice Cube Machines
MXG SERIES
CUBERS
MXG SERIES
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Summary

Unpacking Procedures

Initial Inspection and Carton Removal

Check unit packaging condition and remove securing strips and carton.

Installation Guide

Mounting Ice Maker on Storage Bin

Place ice maker on bin, remove polystyrene and ice chute.

I;R Sensor Installation and Routing

Cutting gasket and routing I/R sensor to the inner bin area.

Data Plate and Grounding Requirements

Check data plate for voltage, fuse, and ensure a solid earth wire.

Environmental and Water Specifications

Required ambient/water conditions and pressure for operation.

Clearance and Airflow Requirements

Minimum 15cm clearance on sides for airflow and connections.

Electrical Connection Guidelines

Installing proper plug, voltage variation, and fuse protection.

Water Inlet and Drain Piping

Connecting water inlet solenoid valve and water drain hose.

Water-Cooled Version Inlet;Drain Fittings

Details on 3/4” inlet fittings and drain hose for water-cooled models.

Start Up and Operational Checks

Initial Power-Up Procedure

Open water tap and switch on the electrical supply line.

Identifying and Using the Master Switch

Locating the green Master Push Switch on the front panel for operation.

Initiating Machine Start-Up Sequence

Pressing the green push button to start the machine.

Operational Components During Freezing

Components active: Compressor, Water Pump, Fan Motor, Contactor.

PC Board LED Status Interpretation

Understanding LED indicators on the PC Board for operational status and errors.

Bin Full Detection and Shutoff

Ice maker turns off when bin is full, interrupting I/R beam.

Operating Principles and Components

DIP Switch Configuration Guide

Explanation of DIP switches 1-10 for controlling machine functions.

Alarm: High Condensing Temperature

Unit OFF if condensing temp exceeds limits; Red ALARM LED ON.

Alarm: High Evaporating Temperature

Unit OFF if evaporating temp is too high after 15 min; Red ALARM LED blinking.

Alarm: Condenser Sensor Failure

Red/Yellow LEDs steady ON indicate condenser sensor failure.

Alarm: Evaporator Sensor Failure

Red/Yellow LEDs blinking indicate evaporator sensor failure.

Alarm: Ice Level Control Failure

Alternating Red/Yellow LEDs indicate ice level control failure.

Maintenance Procedures

Recommended Cleaning and Sanitizing Schedule

Sanitize monthly; clean every six months or when signaled.

Service Analysis and Troubleshooting

Interpreting LED Malfunction Codes

Label on front panel shows LED meanings for diagnosing malfunctions.

Ice Cube with Deep Depression: Short Cycle

Deep depression indicates a short freezing cycle; adjust DIP SWITCH 1-4.

Thin Ice Cube with Big Depression: Sensor Issue

Thin ice with big depression may indicate inoperative evaporator sensor.

Evaporator Sensor Failure Diagnosis

Red LEDs (-15°C) ON immediately at start-up indicates sensor issue.

Clogged Water Filter Diagnosis

Diagnosis of a clogged water filter affecting water supply.

Clogged Water Inlet Strainer Diagnosis

Diagnosis of a clogged water inlet strainer.

Oversized Ice Cubes: Long Freezing Cycle

Oversized ice cubes may require reducing freezing cycle time via DIP SWITCH 1-4.

Mixed Ice Sizes: Refrigerant Charge Issue

Mixed ice sizes may indicate incorrect refrigerant charge (too low).

Ice Level Sensor Failure Diagnosis (Blinking LEDs)

Yellow and Red LEDs blinking alternately indicate ice level sensor failure.

Alarm: High Condensing Temp (Fan Motor Inoperative)

Unit OFF (Red LED ON) due to high condensing temp from inoperative fan motor.

Alarm: High Condensing Temp (Dirty Condenser)

High condensing temperature due to a dirty condenser.

Alarm: High Condensing Temp (High Room Temp)

High condensing temperature caused by high ambient room temperature.

Alarm: High Condensing Temp (No Water Cooled Condenser)

High condensing temp due to no water flow to water-cooled condenser.

Alarm: High Condensing Temp (Condenser Sensor Fault)

High condensing temp due to inoperative condenser sensor.

Alarm: High Evaporating Temp (Red LED Blinking)

Unit OFF (Red LED blinking) due to high evaporating temperature.

Compressor Efficiency: Low Discharge Pressure

Low discharge pressure indicates compressor efficiency loss.

Compressor Efficiency: High Suction Pressure

High suction pressure indicates compressor efficiency loss.

Refrigerant Shortage: Low Discharge Pressure

Low discharge pressure can indicate a lack of refrigerant.

Refrigerant Shortage: Low Suction Pressure

Low suction pressure can indicate a lack of refrigerant.

Refrigerant Leak: High Evaporator Temperature

High evaporator temperature can indicate refrigerant leak.

Refrigerant Leak: High Suction Pressure

High suction pressure can indicate refrigerant leak.

Condenser Sensor Fault Diagnosis (Steady LEDs)

Red/Yellow LEDs steady ON indicate faulty condenser sensor.

Evaporator Sensor Fault Diagnosis (Blinking LEDs)

Red/Yellow LEDs blinking indicate faulty evaporator sensor.

Scotsman MXG 438 A/W Specifications

General IconGeneral
BrandScotsman
ModelMXG 438 A/W
CategoryIce Maker
LanguageEnglish

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