Fault Diagnosis By Symptom; No Power(Completely Dead) - Initial Diagnosis - Samsung NS100SSXEA Service Manual

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
Turn off the breaker and turn it on after 30 seconds
block voltage on L-N for indoor unit
the wired remote controller to operate the
Check DIP SW in the wired remote controller
Is there any error display on the wired
Samsung Electronics
NS090SDXEA_E_SM_33623A(1)_1.indd 18
Check outdoor unit terminal
block voltage on each N-R,N-S,N-T
(230Vac nominal)
Yes
Check outdoor unit terminal
(230Vac nominal)
Yes
Check indoor unit terminal
block voltage on L-N
(230Vac nominal)
Yes
Check indoor unit terminal
block voltage on V1-V2
(12Vdc nominal)
Yes
Check DC power voltage of remote
controller(V1,V2)
Yes
Press the On/Off button on
air conditioner
Yes
Yes
remote controller
No
Check the setting temperature
No
Check AC power source. Reconnect wires correctly.
No
Check Inner wiring of outdoor unit.
Check cable and connection of wire between
No
indoor and outdoor unit.
Check Indoor control PCB, Transformer,
No
and FUSE on PCB and replace one which is broken.
Check cable and connection of wire between
No
remote controller and indoor unit.
No
Replace wired remote controller.
No
Set DIP SW correctly.
No
Check each item according to error code list.
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2011-04-08 10:55:29