McQuay MMC100B User Manual

163 pages

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MDB - 2004

Ducted Split Systems

Models: MDB 075-750B

 MDB 125-150C

 MDB 075-500BR

 MDB 125CR

Questions and Answers:

C
Colleen WilcoxAug 9, 2025
Why is my McQuay MMC100B Air Conditioner not cooling properly?
- E
  elizabethoconnorAug 9, 2025
  If your McQuay Air Conditioner is running but not cooling effectively, several factors could be the cause. First, make sure the thermostat isn't set too high; try resetting it. Ensure all doors and windows are completely closed. If these steps don't help, there might be an obstruction blocking the unit's inlet or outlet; remove any objects you find. For issues such as a dirty condenser coil or insufficient refrigerant, it is best to contact your local dealer.
R
ruth54Aug 16, 2025
What to do if both fan and compressor on my McQuay MMC100B Air Conditioner don't work?
- M
  medinachristineAug 16, 2025
  If neither the fan nor the compressor is working on your McQuay Air Conditioner, there are a few things you can check. First, there may be a power failure; the unit should resume operation when the power supply is restored. Also, the starter may have tripped; try resetting it. Finally, inspect the fuse in the power switch or operating unit and replace it if it's blown.
N
Nancy BanksAug 25, 2025
How to fix a McQuay MMC100B when the fan is not working?
- M
  michaelvazquezAug 25, 2025
  If the fan on your McQuay Air Conditioner isn't working, start by checking the power supply. If the power supply is fine, the issue might be a faulty fan capacitor or fan motor, in which case you should contact your local dealer. Another potential cause is a faulty switch, which would need to be changed.
D
Danielle FergusonAug 31, 2025
What to do if McQuay MMC100B Air Conditioner fan works, but the compressor doesn't?
- A
  Amber ParkerSep 1, 2025
  If the fan on your McQuay Air Conditioner is working, but the compressor isn't, there are a few potential reasons. First, the thermostat setting might be too high; try resetting it. It's also possible that the dual pressure control has tripped; in this case, reset the pressure control. For compressor or compressor contractor issues, contact your local dealer.

McQuay MMC100B Specifications

General

Brand	McQuay
Model	MMC100B
Category	Air Conditioner
Language	English

Summary

Ducted Split Systems

Features Overview

Highlights key features like easy maintenance, installation flexibility, and air quality.

General Specifications

Safety Controls and Functions

Technical Specifications

Heatpump Specifications

Performance Characteristics

Cooling Performance Data

Heatpump Performance Data

Offers heatpump performance data across various conditions for different models.

Unit Dimensions

Outdoor Unit Layouts

Shows outline and dimension drawings for various MMC outdoor units.

Wiring Diagrams

Heatpump System Wiring

Displays heatpump wiring diagrams for specific indoor and outdoor models.

Refrigerant Circuit Diagrams

Installation Procedures

Indoor Unit Installation Steps

Outdoor Unit Installation & Piping

Details outdoor unit location, field piping, and refrigerant charge guidelines.

Servicing, Operation, and Troubleshooting

Maintenance and Operation Guide

Outlines maintenance, operation, controller configuration, and safety precautions.

Troubleshooting Common Issues

Lists common problems and provides diagnostic flowcharts for resolution.

Part Lists

Related product manuals

McQuay MMC100BR

McQuay MMC125BR

McQuay MMC075CR

Preview: McQuay MDB075D