Samsung NS140HHXEA Service Manual page 45

4-6-2 Outdoor unit is not powered on – Initial diagnosis (RC***XG* : 3phase)
1. Check items
1) Is the power supply voltage 380V?
2) Is the AC power connected correctly?
3) Are the LEDs in the main PCB and inverter PCB of the outdoor unit ON?
4) Is the input power voltage of the indoor unit 220V?
5) Is the wired remote controller connected correctly?
2. Check procedure
Turn off the main power switch
(circuit break of power outlet) and turn
on again after 30 seconds.
Is the outdoor unit power
supply (N-R, N-S, N-T) 220Vac?
Yes
Is the outdoor unit power
voltage (L-N) 220Vac?
Yes
Is the indoor unit power supply
voltage (L-N) 220Vac?
Yes
Is the indoor unit power supply
voltage (V1-V2) 12Vdc?
Yes
Does the air conditioner
operate when pressing ON/OFF button
of the wired remote controller?
Yes
cont.
Samsung Electronics
All manuals and user guides at all-guides.com
No
No
No
No
No
Check the input power
Check connection of the outdoor unit
terminal block
Check the connection wires and
connectors of the indoor and outdoor
units
Replace the PCB of the indoor unit if
the PCB (Transformer, fuse, pcd, etc.) fails
Replace the wired remote controller
4-13