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Only for training and service purposes
LGE Internal Use Only
C2008
1-1. The whole flowchart which it follows in voltage output state
1. Power Board
No
No
No
Start check
Does not screen
whole comes out?
Does not
low voltage output comes
out?
Does not
Inverter signal output
comes out?
No
No
No
Yes
Yes No
Yes
Is the Interface
signal operated?
2. Check the Interface signal condition
Yes
Yes
Does not the
INV 24V voltage output
comes out?
Yes
Yes
Is it identical with
power off condition?
1. Check the Power off condition
Yes
Does not the
St-by 5V(P-5V) signal
comes out?
Yes
Does not the
VSC signal INV_CTL
comes out?
Yes
Manufacture enterprise
meaning of a passage
No
6. Check the VSC low Voltage output
Yes
Does not the
AC Detect signal
comes out?
Does not the
RL_ON/PWR_ON/OFF
comes out?
Does not the VSC
Low Voltage output
comes out?
3. Check the St_by 5V signal circuit 4. Check the AC Detect signal circuit 5. Check the VSC RL_ON?PWR_ON/OFF signal
7. Check the VSC INV_CTL signal 8. Check the INV 24V voltage output circuit
TROUBLE SHOOTING
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