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▶ZHBW056A0 / ZHBW076A0 / ZHBW096A0
1. Wait PCB(Inverter) DC voltage is discharged after main power off.
2. Pull out 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(Inverter) 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(Inverter) damaged).
P
W
V
U
Nw Nv Nu
27
26
25
24
23 22 21
P
27
26
0.4 ~ 0.6 V
P
W
27
26
25
SPM3
W
V
U
Nw Nv Nu
25
24
23 22 21
ZHBW056A0
ZHBW076A0
ZHBW096A0
ZHBW126A0
ZHBW146A0
ZHBW166A0
ZHBW128A0
ZHBW148A0
ZHBW168A0
- 84 -
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
V
U
Nw Nv Nu
24
23 22 21
0.4 ~ 0.6 V
PFC_IPM check
U, V, W ' R S T
Model
Resistance(Ω) at 20°C
U-V
0.628(at 25˚C)
V-W
0.628(at 25˚C)
W-U
0.628(at 25˚C)
U-V
0.438(at 25˚C)
V-W
0.438(at 25˚C)
W-U
0.438(at 25˚C)
U-V
0.845Ω(at 25˚C)
V-W
0.845Ω(at 25˚C)
W-U
0.845Ω(at 25˚C)
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Troubleshooting
