Multi F Multi-Zone Systems Service Manual

5. Trouble Shooting

- 64 -

Only for training and service purposes

LGE Internal Use Only

Check Point

1. Check the WCN_P(L),P(N) Connection condition at the Main PCB.(Refer to outdoor wiring diagram)

2. Check the DC Link voltage at not operating(280V

↑

)

3. Check the DC Link voltage at Comp operating(340V

↑

)

4. Check DC Link Sensing Signal :2.4~2.8V (Refer the Picture)

Vdc

< Main PCB>

<DC_LINK Sensing Check P

oint>

< Input Power Source Check Point >

Vdc