LG THERMA V AHBW166A0 - Page 69

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* AHBW126A0/AHBW146A0/AHBW166A0
AC(N)-BLUE
AC(L)-BROWN
UVW
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).
27 26 25 24 23 22 21
P W V U Nw Nv Nu P W V U Nw Nv Nu
0.4 ~ 0.6 V
27 26 25 24 23 22 21
0.4 ~ 0.6 V
PFC_IPM check
U, V, W ‘ R S T