Outdoor Unit Power Supply Error - Samsung AE050JXYDEH Service Manual

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 ALL OFF
Error 202 display Normal
Error 203 display ALL OFF
Samsung Electronics
Is voltage on N-T of terminal
block over 300V?
No
Are wire and socket connected correctly?
Power line N and T wire
Yes
Is there miss connection of power and
communication wire between
indoor and outdoor?
No
Are wire and socket connected correctly?
CN39(MAIN PCB),CN31(INVERTER PCB)
Yes
Is the FUSE on INVERTER PCB blown?
No
Check each BLDC FAN motor
short or not, by resistance between
pin #1 and #3
No
Exchange INVERTER PCB
Yes
Check and correct the power cable wiring
No
Check and correct the wire or
socket connection
Check Fuses listed blow
3 FUSES in EMI PCB, 1 FUSE in MAIN PCB
Yes
Correct the cable wiring
between indoor and outdoor
Check F1,F2 communication line wiring.
CN50(MAIN PCB)
No
Check and correct the wiring
Yes
Exchange the FUSE
Yes
Exchange FAN motor
Troubleshooting
51