Troubleshooting
93
4-5-13 Outdoor unit power supply error
No
No
No
Yes
1. Checklist:
1) Are the input power voltage and power connection correct?
2) Is there any Fuse Short of the indoor or outdoor unit?
3) Is any LED lit on both MAIN PCB and INVERTER PCB?
4) Are Reactor wires of the outdoor unit connected correctly?
2. Troubleshooting procedure
Are wire and socket connected correctly?
Power line N and T wire
Is voltage on N-T of terminal
block over 300V?
Check and correct the power cable wiring
Are wire and socket connected correctly?
CN39(MAIN PCB),CN31(INVERTER PCB)
Is the FUSE on INVERTER PCB blown?
Check and correct the wire or
socket connection
Check Fuses listed blow
3 FUSES in EMI PCB, 1 FUSE in MAIN PCB
No
Is there miss connection of power and
communication wire between
indoor and outdoor?
Correct the cable wiring
between indoor and outdoor
Check F1,F2 communication line wiring.
CN50(MAIN PCB)
Check and correct the wiring
Exchange the FUSE
Exchange INVERTER PCB
Check each BLDC FAN motor
short or not, by resistance between
pin #1 and #3
Yes
No
Yes
No
Yes
Yes
Yes
MAIN PCB INVERTER PCB
ALL OFF ALL OFF
Error 202 display Normal
Error 203 display ALL OFF
Check LEDs on both MAIN PCB
and INVERTER PCB after1 minutes
from power on
Exchange FAN motor
4-6-13
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