80
troublesHooting
4-2-7. When Power is not applied
- To check the Inverter PCB,
refer to the Operation and
'Refer' sections in this
manual
Start
Replace Fuse AC 250V 6.3A
Is FUSE on PCB
Down?
Yes
No
Replace the Inverter PCB
Is DC 300V
applied between both
ends of BD1+,-?
No
Yes
Replace the Inverter PCB
IS DC 13.2V applied
to C121?
No
Yes
Replace REG1(7815)
IS DC 15V applied to
C108?
No
Yes
Replace REG2(5V LDO)
IS DC 5V applied to
C111?
No
Yes
Replace REG3(5V LDO)
IS DC 5V applied to
C118?
No
Yes
1) Check the wire harness
2) Replace PANEL PCB
Does PANEL PCB work
normal?
No
Yes
Normal
Replace the Inverter PCB
Is there any
PCB soldering short
or breakage?
No
Yes
There is Over AC 115V and DC 310V
at the Inverter PCB Power Circuit. So,
be cautious when repairing the unit or
measuring values..
Caution
- Check MAIN PCB Wire
- Check DOOR PANEL PCB