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▶ZHBW126A0 / ZHBW146A0 / ZHBW166A0
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 dam-
aged)
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
Nw Nv Nu
27
26
25
24
23 22 21
P
27
26
0.4 ~ 0.6 V
AC_L
AC_M
W
V
U
Nw Nv Nu
25
24
23 22 21
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Only training and service purposes.
U
V
0.4 ~ 0.6 V
PFC_IPM check
U, V, W ' R S T
W
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Troubleshooting
