Samsung Electronics
4-25
Normal
Normal
Normal
No display
Correct
No
Normal
Normal
4-5 Fault Diagnosis by Symptom
4-5-1 No Power(completely dead) - Initial diagnosis
1. Checklist:
1) Is Power source voltage normal?
2) Is AC power linked correctly?( miss-wiring, wire detaching etc. )
3) Is any LED on the MAIN PCB of Outdoor unit lit?
4) Is terminal voltage for indoor unit normal?(230Vac nominal)
5) Is Wired remote controller installed correctly?
2. Troubleshooting
procedure
Check AC power source.
Reconnect wires correctly
Abnormal
Check outdoor unit terminal
block voltage on each N-R,N-S,N-T
(230Vac nominal)
Turn off the breaker and turn it on after 30 seconds
Check the setting temperature
Check Inner wiring of outdoor unit
Abnormal
Check outdoor unit terminal
block voltage on L-N for indoor unit
(230Vac nominal)
Check cable and connection of wire between
indoor and outdoor unit
Abnormal
Check indoor unit
terminal block voltage on L-N
(230Vac nominal)
Check Indoor control
PCB, Transformer, and FUSE on PCB and
replace one which is broken.
Abnormal
Check indoor unit
terminal block voltage on V1-V2
(12Vdc nominal)
Check cable and connection of wire between
remote controller and indoor unit
Abnormal
Check DC power voltage of
remote controller(V1,V2)
Replace wired remote controller
No display
Press the On/Off button on the
wired remote controller to operate the air
conditioner
Set DIP SW correctly
Wrong setting
Check DIP SW in the
wired remote controller.
Check each item according to error code list
Yes
Is there any error display on
the wired remote controller
