LG Therma V AHBW Series Service Manual page 69

* AHBW126A0/AHBW146A0/AHBW166A0
U,V,W CONNECTOR
1. Wait PCB(Inverter) DC voltage is discharged after main power off.
2. Pull out AC(L), AC(N) connectors and U,V,W COMP Connector.
3. Set multi tester to resistance mode.
4. If the value between P and N terminal of IPM is short(0Ω) or open(hundreds MΩ), PCB needs to be replaced.(IPM
damaged)
5. Set the multi tester to diode mode.
6. In case measured value is different from the table, PCB(Inverter) needs to be replaced.(PCB damaged).
P W V U
27 26 25 24
Nw Nv Nu P
23 22 21
27
0.4 ~ 0.6 V
AC(N)-BLUE
AC(L)-BROWN
W V U Nw Nv Nu
26 25 24 23 22 21
- 69 -
U V W
0.4 ~ 0.6 V
PFC_IPM check
U, V, W ' R S T