OUTDOOR UNIT FAULT CODES
The outdoor unit has an LED on the power board. This LED will be illuminated when
the compressor is running and blink 1s on and 1s off when the compressor is in
standby. If there is a fault on the outdoor unit, it will blink on and off for half a second at
a time, followed by a 3s gap. The number of consecutive blinks will show the fault as
per the table below:
Over voltage /lower voltage
Exhaust over temperature protection
Outdoor coil over temperature protection
Drive fault and protection (V1，VP1)
Communication fault with indoor unit
Compressor overheat fault (compressor top switch)
Short-circuit / open-circuit fault of outdoor temperature sensor
Short circuit / open-circuit fault of outdoor heat exchanger temperature
sensor
Short-circuit / open-circuit fault of exhaust temperature sensor
Communication fault between power source board and IPM
No feedback from DC fan motor(outdoor unit)
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