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Part 5. Trouble Shooting
■ 54k
CN(N)_BLUE
CN(N)_BLUE
CN(N)_BLUE
U,V,W CONNECTOR
U,V,W CONNECTOR
U,V,W CONNECTOR
1. Wait until inverter PCB DC voltage is discharged after main power off.
2. Pull out CN(L), CN(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 needs to be replaced.(PCB damaged).
P
U
V
W
Nu Nv Nw
27
26
25
24
23 22 21
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Only for training and service purposes
P
U
27
26
0.4 ~ 0.6 V
LED01M
LED01M
LED01M
CN(L)_BRWON
CN(L)_BRWON
CN(L)_BRWON
V
W
Nu Nv Nw
25
24
23 22 21
0.4 ~ 0.6 V
- 78 -
U
U
V
V
W
W
LED02M
LED02M
LED02M
PFC_IPM check
U, V, W R S T
LGE Internal Use Only
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