LG Therma V ZHBW056A0 Service Manual page 91

Air-to-water heat pump

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Check Point

1. Check the WCN_P(L),P(N) Connection condition at the main PCB(Heater). (Refer to 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(ZHBW**6A0) :2.4~2.8V (Refer the Picture)

5. Check DC Link Sensing Signal(ZHBW**8A0) :0.4~0.6V (Refer the Picture)

* ZHBW056A0 / ZHBW076A0 / ZHBW096A0

Red

GND

Black

Vdc

- 91 -

Only training and service purposes.

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