No Power(Completely Dead) - Initial Diagnosis - Samsung AC048KXQPCC Service Manual

4-3-3 No Power(completely dead) - Initial diagnosis

Outdoor unit is not powered on – Initial diagnosis (1phase)
1. Check items
1) Is the power supply voltage 220V?
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 (L-N) 220V?
Yes
Is the outdoor unit power
voltage (L-N) 220V?
Yes
Is the voltage between
the terminal 2 (~) and 4 (~) of the
bridge diode 220V?
Yes
Is the fuse connected?
Yes
Is the resistance value of R001 200Ω?
Yes
Cont.
Samsung Electronics
No
Check the input power
No
Check the connection of the terminal block
No
Replace the inverter PBA
No
Replace the fuse
No
Replace the inverter PBA
Troubleshooting
4-7