Outdoor Unit Is Not Powered On – Initial Diagnosis ( 3Phase) - Samsung AC140JXADGH/EU Service Manual

Troubleshooting
Outdoor unit is not powered on – Initial diagnosis ( 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. Troubleshooting 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?
Is the outdoor unit power
voltage (L-N) 220Vac?
Is the indoor unit power supply
voltage (L-N) 220Vac?
Is the indoor unit power supply
voltage (V1-V2) 12Vdc?
Does the air conditioner
operate when pressing ON/OFF button of the
wired remote controller?
4-24
Cont.
No
Check the input power
No
Check connection of the outdoor unit
terminal block
No
Check the connection wires and
connectors of the indoor and outdoor units
No
Replace the PCB of the indoor unit if
the PCB (Transformer, fuse, pcd, etc.) fails
No
Replace the wired remote controller
Samsung Electronics