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Scotsman MXG Series - User Manual

Scotsman MXG Series
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

Unpacking Steps and Guidelines

Detailed steps for safely unpacking the ice machine from its packaging, including checks.

INSTALLATION

Installation Steps and Component Placement

Covers connecting I/R sensors, chutes, and model-specific mounting.

Electrical and Water Requirements

Details voltage, grounding, ambient/water conditions, and clearance requirements.

Air Flow and Model Considerations

Illustrates air flow for different models and notes model-specific locations.

Special Installation Types

Covers stacking, electrical connections, water piping, and typical configurations.

START UP AND OPERATIONAL CHECKS

Initial Power On and Machine Start

Steps to activate the machine, including water supply and master switch operation.

Understanding Start-Up Delays and Phases

Explains factory-set delays and the water filling phase.

Component Operation During Start-Up

Lists electrical components active during initial start-up and operational phases.

Monitoring Freezing Cycle and LEDs

Details LED indicators for Power, Freezing, and other states during operation.

Defrost;Harvest Cycle and DIP Switch Settings

Explains the defrost/harvest cycle, component operation, and DIP switch configurations.

Adjusting Cycle Lengths with DIP Switches

Covers controlling defrost/harvest cycle length using DIP switches 5-8.

Bin Full Detection and I;R Beam Test

Describes bin full detection and testing the I/R beam operation.

OPERATING PRINCIPLES AND COMPONENTS

Refrigerant Cycle Operations (Freeze & Harvest)

Diagrams illustrating the refrigerant flow during freezing and harvest cycles.

Water System Flow Diagrams

Visual representation of water flow during freezing and harvest phases.

Key Components and Settings

Identification of valves, sensors, and settings like TXV and water regulating valve.

PC Board, DIP Switches, and Jumpers

Explanation of the PC board, DIP switch functions, and jumper settings for cycle control.

Understanding Cycle Timings (T1, T2, Ta, Ts, Te)

Definition and explanation of various time parameters affecting cycle duration.

PC Board Alarms and Error Indicators

Details on LED indicators and error conditions like high temperatures, sensor failures, and control issues.

COMPONENTS - REFRIGERANT SYSTEM

Compressor

The primary component responsible for circulating refrigerant and creating pressure differences.

Air Cooled Condenser

Component that dissipates heat from the refrigerant to the surrounding air.

Evaporator

Component where refrigerant absorbs heat, causing water to freeze into ice.

Suction Line and Capillary Tube

Lines for refrigerant flow and pressure regulation within the system.

Drier

Component that removes moisture and contaminants from the refrigerant.

Hot Gas Valve

Valve used in defrost cycles to melt ice from the evaporator.

COMPONENTS - WATER SYSTEM

Water Inlet Valve

Controls the flow of water into the machine.

Water Sump

Reservoir that collects and holds water for the freezing cycle.

Water Pump

Circulates water to the evaporator molds.

Spray Bar

Distributes water evenly over the evaporator molds.

Overflow

Manages water level in the sump, preventing overfilling.

Water Drain Valve

Controls the drainage of water from the sump.

COMPONENTS - ELECTRICAL CONTROLS

Master Switch

The main power switch for the ice machine.

PC Board

The central control unit managing all machine functions and operations.

Evaporator Sensor

Measures the temperature at the evaporator to control freezing cycles.

Condenser Sensor

Monitors condenser temperature to prevent overheating.

Optical Ice Level Control

Detects the ice level in the storage bin to stop production.

MAINTENANCE

Cleaning and Sanitizing Schedule

Outlines the importance and frequency of cleaning and sanitizing the ice machine.

Preparation and Safety Precautions

Lists required tools and safety measures before starting maintenance.

Step-by-Step Cleaning Process

Detailed instructions for cleaning internal and external parts, including solution preparation and machine cycling.

Rinsing and Final Checks

Procedures for rinsing the system and verifying ice quality after cleaning.

SERVICE ANALYSIS

Ice Cube Quality Analysis

Describes ideal ice cube characteristics and common defects like depressions and thinness.

Troubleshooting Ice Formation Issues

Addresses problems like uneven ice, oversized/undersized cubes, and their causes and solutions.

Understanding PC Board Alarms and Sensor Failures

Explains LED error codes for ice level sensor, condenser, and evaporator sensor failures.

Diagnosing High Temperature Conditions

Identifies causes for high condensing or evaporating temperatures leading to unit shutdown.

Refrigerant System Faults and Diagnosis

Lists common refrigerant system issues like leaks, low charge, and compressor inefficiency.

Water System and Component Troubleshooting

Covers issues related to water supply, filters, valves, and spray bars.

Scotsman MXG Series Specifications

General IconGeneral
Ice TypeCube
Cooling SystemAir-cooled or Water-cooled
RefrigerantR404A
MaterialStainless Steel
TypeModular Ice Machine
AmperageVaries by model
WeightVaries by model
Power Supply208-230V, 1PH, 60Hz (varies by model)

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