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.
| Error Codes | Possible Fault |
|---|---|
| E01 | Require manual reset (possible causes) |
| E02 | Compressor 1 high temperature (overload) |
| E03 | Compressor 2 high temperature(overload) |
| E06 | Compressor 1 high pressure trip / contact open |
| E07 | Compressor 2 high pressure trip / contact open |
| E10 | Compressor 1 trip / low R-22 / outdoor abnormal |
| E11 | Compressor 2 trip / low R-22 / outdoor abnormal |
| E14 | Room sensor short |
| E15 | Room sensor open |
| E16 | Indoor coil sensor 1 short |
| E17 | Indoor coil sensor 2 short |
| E20 | Indoor coil sensor 1 open |
| E21 | Indoor coil sensor 2 open |
| E24 | Outdoor coil sensor 1 short |
| E25 | Outdoor coil sensor 2 short |
| E28 | Outdoor coil sensor 1 open |
| E29 | Outdoor coil sensor 2 open |
| E32 | Compressor 1 de-ice |
| E33 | Compressor 2 de-ice |
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).
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