Sunlight Supply Samsung Programmable Thermostat for Split Systems - Manual (Page 97)

Samsung Electronics 12-34
No
No
No
Yes
Yes
12-2-2 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
Are wire and socket connected correctly?
Power line N and T wire
(Terminal block - reactor - EMI PCB),
CN9(EMI PCB), CN80(MAIN PCB)
Is voltage on N-T of terminal
block over 300V?
Check and correct the power cable wiring
Are wire and socket connected correctly?
CN31(MAIN PCB),CN10(INVERTER PCB)
Is the FUSE on INVERTER PCB blown?
Is R100 on INVERTER PCB open?
(200ohm moninal)
Check INVERTER PCB
Are wire and socket connected correctly?
CN05,06,07 TAB terminal(EMI PCB),
CN20(INVERTER PCB)
Check and correct the wire or
socket connection
Check Fuses listed blow
FUSE3(EMI PCB), FUSE(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
Replace the FUSE
Replace INVERTER PCB
Also check each BLDC FAN moto
short or not, by resistance between
pin #1 and #3
Check and correct the wiring
Check the M/C
Yes
No
No
Is there any power wire detaching
especially phase R and S?
Check and correct the power cable wiring
Check Fuses listed blow
FUSE1(EMI PCB), FUSE2(EMI PCB)
Yes
Yes
No
Yes
Yes
No
Yes
MAIN PCB INVERTER PCB
ALL OFF ALL OFF
Error 202 display
(Table No.14)
Normal
Error 425 display
(Table No.22)
ALL OFF
Error 203 display
(Table No.3)
ALL OFF
Error 466 display
(Table No.7)
Error 466 display
(Table No.7)
Error 469 display
(Table No.19)
Error 469 display
(Table No.19)
Check LEDs on both MAIN PCB
and INVERTER PCB after1 minutes
from power on