Outdoor Unit Fault Codes - TCL iQool9 User And Installation Manual

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
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 (V1，VP1)
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
Fault
38