ElectrIQ iQool9PLUS-V2 User And Installation Manual page 39

TROUBLESHOOTING AND SELF DIAGNOSIS
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 flashes
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Indoor and outdoor communication fault
Main board and driver board communication fault
Compressor starting abnormal (phase failure, reverse)
Compressor out-of-step fault
Compressor shell roof fault/protection
Exhaust temperature sensor fault
Suction temperature sensor fault
Outdoor coil temperature sensor fault
Outdoor ambient temperature sensor fault
Outdoor DC fan motor fault
Outdoor AC current protection
Compressor phase current protection
Outdoor unit over-high/over-low AC voltage protection
Outdoor unit over-high/over-low DC voltage protection
IPM over-high temperature protection
Exhaust temperature overheat protection
Cooling indoor coil anti-freezing protection
Cooling outdoor coil overheat protection shutdown
Heating indoor coil overheat protection
Cooling outdoor ambient temperature over-low protection
Heating outdoor ambient temperature over-high protection
Fault
IPM module fault
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