Samsung CH070EAV1 Service Manual page 60

4-5-2 The 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
(Table No.14)
Error 425 display
ALL OFF
(Table No.22)
Error 203 display
ALL OFF
(Table No.3)
Error 466 display Error 466 display
(Table No.7) (Table No.7)
Error 469 display Error 469 display
(Table No.19) (Table No.19)
4-20
MEMO
Is voltage on N-T of terminal
block over 300V?
No
Are wire and socket connected correctly?
Power line N and T wire
(Terminal block - reactor - EMI PCB),
CN9(EMI PCB), CN80(MAIN PCB)
�es
Is there miss connection of power and
communication wire between
indoor and outdoor?
No
Is there any power wire detaching
especially phase R and S?
No
Are wire and socket connected correctly?
CN31(MAIN PCB),CN10(INVERTER PCB)
�es
Is the FUSE on INVERTER PCB blown?
No
Is R100 on INVERTER PCB open?
(200ohm moninal)
No
Check INVERTER PCB
Are wire and socket connected correctly?
CN05,06,07 TAB terminal(EMI PCB),
CN20(INVERTER PCB)
�es
�es
Check and correct the power cable wiring
No
Check and correct the wire or
socket connection
Check Fuses listed blow
FUSE3(EMI PCB), FUSE(MAIN PCB)
�es
Correct the cable wiring
between indoor and outdoor
Check F1,F2 communication line wiring.
CN50(MAIN PCB)
�es
Check and correct the power cable wiring
Check Fuses listed blow
FUSE1(EMI PCB), FUSE2(EMI PCB)
No
Check and correct the wiring
�es
Replace the FUSE
�es
Replace INVERTER PCB
Also check each BLDC FAN moto
short or not, by resistance between
pin #1 and #3
No
Check and correct the wiring
Check the M/C
Samsung Electronics