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Maytag MQU2057AEW User Manual

Maytag MQU2057AEW
51 pages
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Freezers
This Base Manual covers general information
Refer to individual Technical Sheet
for information on specific models
This manual includes, but is
not limited to the following:
Amana
AFU1202BW
AFU1505BW
AFU1567BW
AFU1705BW
AFU1767BW
AFU2005BW
AFU2067BW
AQU1525AEW
Maytag
MQU1554AEW
MQU1556AEW
MQU2056ARW
MQU2057AEW
Service
This manual is to be used by qualified appliance
technicians only. Maytag does not assume any
responsibility for property damage or personal
injury for improper service procedures done by
an unqualified person.
16023585
September 2004

Table of Contents

Questions and Answers:

Maytag MQU2057AEW Specifications

General IconGeneral
BrandMaytag
Model NumberMQU2057AEW
Product TypeFreezer
ColorWhite
Defrost TypeFrost-free
Energy Star CertifiedYes
Installation TypeFreestanding
Door SwingReversible
Temperature ControlElectronic

Summary

Important Information

Servicer and Consumer Notices

Critical notices for technicians and users regarding safety and service.

Customer Support Contact Information

Lists phone numbers and websites for customer service and support centers.

Safety Symbols and Labels Guide

Explains the meaning of various safety symbols and warning labels used in the manual.

Model Identification

Amana & Maytag Model Coding

Explains the coding system used to identify Amana and Maytag freezer models.

Installation Instructions

Unpacking and Initial Setup

Steps for removing protective packaging and preparing the freezer for installation.

General Installation Guidelines

Provides general advice and requirements for installing the freezer unit.

Freezer Location Recommendations

Guidance on selecting an appropriate location for optimal freezer performance.

Electrical Connection Requirements

Details on proper electrical hookup, grounding, and voltage requirements.

Door Handle Installation

Step-by-step instructions for attaching the freezer door handle.

Leveling the Freezer Unit

Procedures for ensuring the freezer is correctly leveled for proper operation.

Post-Installation Checks

Essential tests and checks to perform after the freezer has been installed.

General Instructions

Electrical Requirements and Grounding

Specifics on electrical supply, grounding, and safety precautions.

Model Identification Details

Information on locating and recording model and serial numbers for service.

Proper Freezer Disposal Safety

Guidelines for safely disposing of an old freezer to prevent hazards.

Operating Instructions

Setting Freezer Controls

Guidance on adjusting the temperature control for optimal operation.

Temperature Control Dial Operation

Detailed explanation of the temperature control dial settings and adjustments.

Freezer Features Overview

Introduces various features of the freezer, including door lock and racks.

Door Lock Mechanism

Instructions on how to use and secure the freezer's door lock.

Reversible Rack Usage

How to install and utilize the reversible rack for flexible storage.

Food Freezing and Wrapping Guide

Recommendations for proper food wrapping and recommended storage times.

Care and Cleaning

General Cleaning Procedures

Basic instructions for cleaning the freezer interior and exterior surfaces.

Removing Adhesive Residue

Method for effectively removing sticky residues from surfaces.

Door Gasket Maintenance

How to clean and maintain freezer door gaskets for a proper seal.

Odor Removal Techniques

Steps to eliminate unpleasant odors from inside the freezer.

Defrosting Procedure

Step-by-step guide for manually defrosting the freezer.

Replacing Interior Light Bulb

Instructions for safely replacing the freezer's internal light bulb.

General Tips

Energy Saving Tips

Advice for operating the freezer efficiently to reduce energy consumption.

Vacation Preparation Guidelines

How to prepare the freezer for extended periods of non-use.

Normal Operating Sounds Explained

Identifies and explains the typical sounds the freezer may produce.

Troubleshooting Common Issues

Guidance on diagnosing and resolving common freezer problems before calling service.

Normal Operating Sounds Illustrated

Visual representation of normal operating sounds and their sources within the freezer.

Component Testing

Refrigeration System Test Procedures

Methodologies for testing the refrigeration system's components and performance.

Testing the Main Condenser

Procedure for testing the functionality and integrity of the main condenser.

Leak Testing Procedures

Safety precautions and methods for detecting refrigerant leaks in the system.

Electrical System Safety

Information on safe electrical handling and grounding practices.

Compressor Electrical Tests

Steps for testing the electrical integrity of the compressor.

Direct Compressor Test Method

How to perform a direct electrical test on the compressor.

Overload Protector Function and Testing

Explains the overload protector and details its testing procedure.

Capacitor Testing Procedure

Instructions on how to test the compressor's start capacitor using a meter.

PTC Relay Testing

Procedure for testing the Positive Temperature Coefficient (PTC) relay.

Interior Light and Switch Testing

Steps to test the freezer's interior light and its associated switch.

Checking Temperature Control Operation

How to verify the correct operation of the freezer's temperature control.

Temperature Control Calibration Test

Procedures for testing the temperature control's cut-in and cut-out points.

Defrost Timer Operation Explained

Details on how the defrost timer functions to initiate defrost cycles.

Checking the Defrost Timer

Step-by-step guide to test the defrost timer's continuity and function.

Defrost Heater and Thermostat Testing

Procedures for testing the defrost heater and its safety thermostat.

Freezer Fan Motor Testing

How to test the freezer fan motor for proper operation.

Troubleshooting

Frost Build-up on Freezer Coil

Addresses causes and corrections for frost accumulation on the evaporator coil.

Compressor Temperature and Sweating Issues

Troubleshoots high freezer temperatures and external sweating.

Compressor Not Running and No Light

Diagnoses issues when the compressor fails to start and the light is off.

Compressor Cycling and Freezing Problems

Addresses issues like short cycling and the freezer not freezing adequately.

Defrost Water Disposal Issues

Solutions for problems related to water drainage during defrost cycles.

Disassembly Procedures

Replacing the Refrigerant Drier

Step-by-step instructions for replacing the refrigerant drier filter.

Replacing the Compressor

Detailed guide for removing and installing a replacement compressor.

Replacing Heat Exchanger (Refrigerated Shelf Models)

Procedure for replacing the heat exchanger in refrigerated shelf freezer models.

Replacing Heat Exchanger (No-Defrosting Models)

Procedure for replacing the heat exchanger in no-defrosting freezer models.

Replacing Freezer Shelving (Refrigerated Shelf Models)

How to remove and replace steel shelves in refrigerated shelf models.

Replacing Freezer Coil (No-Defrosting Models)

Instructions for removing and replacing the freezer coil in no-defrosting units.

Replacing the Light Switch

Steps for removing and installing a new interior light switch.

Replacing the Temperature Control

Guide for replacing the freezer's temperature control assembly.

Replacing the Defrost Heater

Instructions for replacing the defrost heater component.

Replacing the Freezer Fan Motor

Procedure for removing and installing a replacement freezer fan motor.

Cabinet Door Assembly Components

Overview of the various parts that make up the freezer's cabinet door assembly.

Cabinet Door Removal and Installation

Steps for safely removing and reinstalling the freezer door.

Door Liner and Gasket Replacement

Instructions for replacing the inner door liner and its gasket.

Door Handle Replacement Procedure

How to remove and install the freezer door handle and insert.

Door Lock Assembly Overview

Explanation of the door lock mechanism, its operation, and common issues.

Removing the Door Lock Assembly

Detailed steps for disassembling and removing the door lock.

Cabinet Door Alignment Guide

Procedures for aligning the freezer door for proper closure and seal.

Gasket Seal Check and Improvement

Methods to check door gasket seal effectiveness and improve it.

Hinge Adjustments for Door Alignment

How to adjust door hinges to correct sagging or misalignment.

Cabinet Assembly Details

Description of the freezer's cabinet structure, liner, and drain system components.

Service Information

System Operation Fundamentals

Basic principles of how the freezer's refrigeration system functions.

Failed Compressor Diagnosis

Common causes and troubleshooting steps for compressor failure.

Refrigerant Charge Issues

Problems related to incorrect refrigerant levels and their diagnosis.

Low Side Tubing Restrictions

Identifying and resolving blockages within the low-side refrigerant tubing.

System Pressure Unloading Explanation

Details on how pressure unloading occurs within the refrigeration system.

Pull Down Overload Conditions

Understanding and troubleshooting overload conditions during freezer operation.

Checking Operating Pressures

Procedures for measuring and interpreting system pressures for diagnostics.

Operational Testing Procedures

Methods for conducting functional tests on the freezer's operation.

Service Hints and Usage Tips

Practical advice for servicing and customer usage recommendations.

Compressor Cycle and Noise Analysis

Information on compressor on/off cycles and normal operating noise.

Urethane Foam Insulation Voids

Diagnosing and addressing potential voids in the freezer's insulation.

Refrigeration System Complaints

Common customer complaints and diagnostic steps for refrigeration issues.

Refrigerant Leaks and Detection

Methods for finding and repairing refrigerant leaks, including internal types.

Evacuation and Charging Procedures

Detailed steps for evacuating and charging the refrigeration system.

HFC134a Refrigerant Information

Technical data and properties of HFC134a refrigerant compared to CFC12.

Health, Safety, and Handling (HFC134a)

Critical safety precautions for working with HFC134a refrigerant.

Service Equipment for HFC134a Systems

Lists specialized tools and equipment required for servicing HFC134a systems.

Drier Replacement Procedure

Step-by-step guide for replacing the system's drier filter.

Replacing HFC134a Service Compressor

Instructions for installing a new HFC134a compatible compressor.

Refrigerant Charge and Leak Testing

Correct refrigerant charge amounts and procedures for leak testing.

Evacuation and Charging Setup

Typical setup and detailed steps for system evacuation and charging.

Dehydrating Sealed Refrigeration System

Process for removing moisture from the sealed system to prevent acid formation.

Brazing Procedures and Precautions

Safety measures and techniques for brazing refrigeration system joints.

Refrigerant Handling Precautions

Essential safety guidelines for handling refrigerants to prevent injury.

Keeping Refrigeration Lines Closed

Importance of preventing atmospheric contamination of refrigeration lines.

Line Piercing Valves Usage and Limitations

Guidance on using line piercing valves for diagnosis and their limitations.

Altitude Adjustment for Temperature Control

How to adjust the temperature control for variations in altitude.

Cabinet Shell Construction

Description of the outer steel shell and its construction features.

Cabinet Liner and Component Attachment

Details on the interior liner and how components are attached.

Drain System Operation and Maintenance

Explanation of the defrost water drain system and its maintenance.

Wiring Diagram and Schematic

Manual Defrost Models Wiring Diagram

Electrical schematic showing the wiring for manual defrost freezer models.

Frost Free Models Wiring Diagram

Electrical schematic illustrating the wiring for frost-free freezer models.

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