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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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Air Conditioner Service Manual
PM protection
Over voltage /lower voltage
Overcurrent
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
Short-circuit / open-circuit fault of exhaust temperature sensor
Voltage sensor fault
Current sensor fault
PM fault
Communication fault between power source board and IPM
No feedback from DC fan motor(outdoor unit)
Defrost state
Failure
11
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