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n Inverter IPM inspection method
N
P
1. Wait until the Inverter PCB DC voltage is discharged after main power off. (10 min.)
2. Pull out all the connector connected with Inverter PCB.
3. Set multi tester to resistance mode.
4. Measured value should be 0.2 ~ 0.6 V measuring as below table.
5. In case that the measured value is different from the table, set multi tester to resistance mode and measure.
If the value is short (0 Ω) or Open (hundreds MΩ), Inverter PCB needs to be replaced.
6. In case measured value is different from the table, PCB needs to be replaced.(PCB damaged).
U terminal : red(+)
V terminal : red(+)
W terminal : red(+)
U terminal : black(-)
V terminal : black(-)
W terminal : black(-)
] Red(+) and black(-) are the measuring terminals of multi tester.
The phenomena from main component failure
U
V
W
P terminal : black (-)
0.2 ~ 0.6 V
0.2 ~ 0.6 V
0.2 ~ 0.6 V
P terminal : red(+)
-
-
-
- 39 -
N terminal : red (-)
-
-
-
N terminal : red (+)
0.2 ~ 0.6 V
0.2 ~ 0.6 V
0.2 ~ 0.6 V
U
V
W
N
P
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