Outdoor Unit Power Supply Error - Samsung AEX160EDEHA Service Manual

Troubleshooting

4-5-13 Outdoor unit power supply error

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
Check LEDs on both MAIN PCB
and INVERTER PCB after1 minutes
from power on
MAIN PCB INVERTER PCB
ALL OFF
Error 202 display
Error 203 display
68
RC160MHXGA_SM_E_34513A(1)_4.indd 68
Is voltage on N-T of terminal
block over 300V?
Are wire and socket connected correctly?
Power line N and T wire
ALL OFF
Is there miss connection of power and
communication wire between
indoor and outdoor?
Normal
Are wire and socket connected correctly?
CN39(MAIN PCB),CN31(INVERTER PCB)
ALL OFF
Is the FUSE on INVERTER PCB blown?
Check each BLDC FAN motor
short or not, by resistance between
Exchange INVERTER PCB
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
Yes
pin #1 and #3
No
Check and correct the power cable wiring
Check and correct the wire or
socket connection
Check Fuses listed blow
3 FUSES in EMI PCB, 1 FUSE in MAIN PCB
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 FAN motor
Samsung Electronics