Error Code (SLM3)
Room air sensor contact loose / short
Indoor coil sensor contact open
Outdoor coil sensor contact open
Compressor overload protection /
Indoor coil sensor short /
Outdoor coil sensor short
Error Code (Sequential Controller)
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:
Require manual reset (possible causes)
Indoor coil sensor 4 short
Compressor 1 high temperature (overload)
Indoor coil sensor 1 open
Compressor 2 high temperature (overload)
Indoor coil sensor 2 open
Compressor 3 high temperature (overload)
Indoor coil sensor 3 open
Compressor 4 high temperature (overload)
Indoor coil sensor 4 open
Compressor 1 high pressure trip / contact open
Outdoor coil sensor 1 short
Compressor 2 high pressure trip / contact open
Outdoor coil sensor 2 short
Compressor 3 high pressure trip / contact open
Outdoor coil sensor 3 short
Compressor 4 high pressure trip / contact open
Outdoor coil sensor 4 short
Compressor 1 trip / low R-22 / outdoor abnormal
Outdoor coil sensor 1 open
Compressor 2 trip / low R-22 / outdoor abnormal
Outdoor coil sensor 2 open
Compressor 3 trip / low R-22 / outdoor abnormal
Outdoor coil sensor 3 open
Compressor 4 trip / low R-22 / outdoor abnormal
Outdoor coil sensor 4 open
Indoor coil sensor 1 short
Indoor coil sensor 2 short
Indoor coil sensor 3 short
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