Product specifications

Troubleshooting

68 Samsung Electronics

4-5-13 Outdoor unit power supply error

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

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

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

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