Samsung AQV12NSA Service Manual page 57

Troubleshooting
12-2-2 The Outdoor unit power supply error
1. Checklist :
1) Are the input power voltage and the power connection correct?
2) Is there no Fuse short in the indoor unit and outdoor unit?
3) Is the cable connected correctly between the indoor unit and outdoor unit in order.
4) Is the wire connected correctly to the terminal block of the indoor unit and outdoor unit?
2. Troubleshooting procedure
Is the voltage of indoor unit
terminal block 1 and 2 correct
after power input?
Yes
Pull out the power cord
and execute the following step
after 30 seconds.
Is the outdoor unit normal?
Yes
Is the outdoor unit normal?
Is the reactor connected correctly?
Yes
Is the +, - of C102 short?
Yes
Exchange the PCB.
Yes
Is the +,- of C102 short?
Yes
Exchange the PCB.
12-3
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No
Is the R701 resistance of
indoor PCB 200Ω?
Is the indoor unit fuse normal?
No
Exchange the fuse.
No
Connect the reactor wire.
No
Disassemble the PCB
from the case.
Is there no error at
the insertion of PCB?
Exchange the PCB.
No
Are the BLDC FAN Wire
1 and 3 short?
Exchange the BLDC FAN.
No
Exchange the PCB.
No
Exchange the fuse.
Yes
Yes
Yes
Normal Operation
Exit
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