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McQuay Rooftop Package AC Error Codes

 When the system is on and an error occurs, the ON/OFF LED on the LCD panel will blink and an error code is shown. When the system is off and there is a thermistor error, the ON/OFF LED is off but the error code is still displayed. Each error code represents different message as below.

McQuay Rooftop Packaged AC Error Code
Error CodesPossible Fault
E01Require manual reset (possible causes)
E02Compressor 1 high temperature (overload)
E03Compressor 2 high temperature(overload)
E06Compressor 1 high pressure trip / contact open
E07Compressor 2 high pressure trip / contact open
E10Compressor 1 trip / low R-22 / outdoor abnormal
E11Compressor 2 trip / low R-22 / outdoor abnormal
E14Room sensor short
E15Room sensor open
E16Indoor coil sensor 1 short
E17Indoor coil sensor 2 short
E20Indoor coil sensor 1 open
E21Indoor coil sensor 2 open
E24Outdoor coil sensor 1 short
E25Outdoor coil sensor 2 short
E28 Outdoor coil sensor 1 open
E29Outdoor coil sensor 2 open
E32Compressor 1 de-ice
E33Compressor 2 de-ice

 

McQuay Rooftop Packaged Sequential Controller Functions

 

McQuay Rooftop Packaged AC Error Code
McQuay Rooftop Packaged AC Error Codes

Features

  • High Efficiency: The McQuay rooftop unit is supplied with high efficiency and reliable scroll compressor (except MRT 080/100/150/200 AR).
  • Package Unit: Dubbed the “Plug and Play” equivalent in the air-conditioning industry, the single unit configuration allows hassle free installation. No additional piping work is required as both the indoor and outdoor sides are pre-connected. Refrigerant is factory pre-charged to ensure clean and efficient operation.
  • Flexibility Of Air Supply: McQuay rooftop unit uses a belt driven fan such that the air volume and static required can be adjusted according to the requirement. This flexibility allows for wider application.
  • Flat Top Design: McQuay rooftop unit’s flat top design allows for maximum utilization of warehouse and container space.
  • Electrical Control Capability: All series are equipped with our Electronic Remote Controller (SLM and Sequential LCD). The Sequential LCD features 7 days programmable timer, compressor run/error status, cool/heat/fan/dry/auto modes, etc, while the SLM features a 15 hour delay timer, cool/heat/fan/dry/auto modes, etc. Part loading of system capacity is now possible with the use of our Sequential PAC (Package Air-Condition) control for multiple compressor McQuay rooftop units (M(4)RT150/200/250/300/360/420 A/AR).

McQuay Rooftop Packaged AC Manual PDF

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