Multi Zone Service Manual - General

5. Trouble Shooting
- 62 -
Only for training and service purposes
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 Voltage Check Point>
<DC_LINK Sensing Check P
oint>
< Input Power Source Check Point >
Vdc