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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:
No. of blinks
Fault
1
IPM protection
2
Over voltage /lower voltage
3
Overcurrent
4
Exhaust over temperature protection
5
Outdoor coil over temperature protection
6
Drive fault and protection (V1VP1)
7
Communication fault with indoor unit
8
Compressor overheat fault (compressor top switch)
9
Short-circuit / open-circuit fault of outdoor temperature sensor
10
Short circuit / open-circuit fault of outdoor heat exchanger temperature
sensor
11
Short-circuit / open-circuit fault of exhaust temperature sensor
12
Voltage sensor fault
13
Current sensor fault
14
IPM fault
15
Communication fault between power source board and IPM
16
No feedback from DC fan motor(outdoor unit)
17
Defrost state
38


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