What to do if my McQuay MMC is not cooling enough?
If your McQuay Air Conditioner isn't cooling sufficiently, it might be due to a dirty indoor or outdoor coil. Try cleaning the coil. Also check for any obstructions at the air inlet or outlet of the indoor or outdoor unit and remove them. It could also be caused by a refrigerant short charge or leakage, in which case you should add refrigerant and repair the leakage.
How to fix a McQuay MMC Air Conditioner that won't turn on (no cooling/heating)?
If your McQuay Air Conditioner fails to start, it could be due to a faulty contactor, contacts or motor. Try changing the contactor or the contacts. You might also need to repair or change the motor.
Why McQuay MMC Air Conditioner shows high side low side?
If your McQuay Air Conditioner is showing a high side low side issue, it could be due to: * An undercharge of refrigerant. * Refrigerant leakage. * A clogged or dirty air filter in the indoor unit. * A locked indoor fan (during cooling). * A defective defrost control causing outdoor coil freeze-up (during heating). * A locked outdoor fan (during heating).
General| Cooling Capacity | 9, 000 - 36, 000 BTU/h |
|---|---|
| HSPF | Up to 10 |
| Refrigerant | R410A |
| Type | Mini-Split |
| Voltage | 208/230V |
Lists McQuay brand and generic model names for various unit types.
Provides conversion factors for units like capacity, pressure, flow rate, temperature, and volume.
Matrix showing mainboard compatibility with compatible handset models for various unit series.
Explains the functions and buttons of the G6 remote control for air conditioning units.
Explains G7 remote control functions, including turbo and clock settings.
Covers G11 handset functions like temperature, mode, fan speed, sleep, and personalization.
Details G17 handset operations including personalize setting, turbo, and timer functions.
Explains GS01 handset controls like SWING mode, turbo function, and timer settings.
Describes APJ1 handset features like ECONO, POWERFUL, mode selection, and fan operation.
Covers SLM3 handset functions including temperature, modes, fan speed, timer, and sleep mode.
Explains SLM8 handset controls for mode, fan speed, temperature, sleep, and timer settings.
Details Sequential Controller functions like ON/OFF, mode, SAVE mode, and key lock.
Explains Netware 3 and 3C operation, mode selection, fan speed, and sleep mode.
Covers Rooftop Panel LCD display, ON/OFF, HEAT, COOL, ALARM, and navigation buttons.
Details Chiller Panel LCD display, ON/OFF, HEAT, COOL, ALARM, and navigation.
Explains MC301 operation for ON/OFF, temperature, fan speed, mode, swing, sleep, and clock.
Covers MC303 operation for address register, unit setting, mode, temperature, and fan speed.
Explains how to configure auto random restart using jumpers on the main board.
Details three selections for hot keep function based on indoor coil temperature.
Covers model selection, operating modes, stage differential temperature, and hot keep options.
Explains jumper settings for VALVE and HEAT on W1V3 fan coil units.
Details jumper configurations for operating modes on W2.0 fan coil units.
Summarizes hardware settings for SLM8 using jumpers for temperature range and turbo/quiet features.
Details components needed to convert U1.5 heatpump PCB for auxiliary heater application.
Explains conversion to multi-split units for Cooling Only and Heatpump models.
Outlines differences and required parts for converting U1.5 PCB to L208A PCB.
Details conversion from WMF U1.4 to L2EF, noting display panel and switch board incompatibility.
Describes the conversion of SQ Board for wiring up to 1000m, involving jumper removal and IC soldering.
Explains how to use the TH1 temperature sensor on Netware 3 as a room sensor.
Correlates LED patterns with fault indications and actions for Wall Mounted F Series.
Lists error codes and their corresponding faulty indications for various handset models.
Details MDS diagnosis using indoor unit LED indicators and wired controller error codes.
Provides a general check list for common unit malfunctions like no fan or compressor issues.
Guides troubleshooting based on high/low side pressure readings and probable causes.
Provides resistance (Rmin, Rnom, Rmax) values in kΩ for various temperatures in °C.
Shows compatibility between Indoor PCBs, Wired Handsets, and Outdoor PCBs for MDS units.
Details dip switch settings for MDS-B PCB versions based on HP capacity.
Lists cable types and standard, optional, and maximum lengths for wired handsets.
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