Air Conditioner Service Manual
10
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Outdoor failure display
There is a LED on outdoor power board, it blinks 1s ON and 1s OFF while compressor standby and
it always light (ON) while compressor running; If there is failure happened on ODU,
The indicator (LED)
alerts the fault in a cycle as such that it is bright for
0.5 seconds, dark for 0.5 seconds, blinks “n” times
and then dark for 3 seconds. For details
as table below.
Display on outdoor power source board:
blink time (n)
Failure
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