to download LG Multi V Plus - Hawco

2.6 Fan IPM Checking Method
2.7 UW1 chassis(2 Fan)
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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Checking Method for Key Components
1. Wait until inverter PCB DC voltage gets discharged after the main power switch off.
2. Pull out DC connector and U,V,W fan motor connector connected with fan PCB
3. Set multi tester in resistance mode .
4. If the value between P and N terminal of IPM is small (0Ω) or tens KΩ, PCB needs to be replaced (IPM damaged).
5. In case the measured value is open(hundreds KΩ), measure resistance mode, and the value should be within
35 KΩ ±10% as shown below table.
6. If the measured value is different from the value given in the table, PCB is needs to be replaced.
P terminal : black (-) N terminal : red (-)
U terminal : red(+) 35K Ω ± 10% Open
V terminal : red(+) 35K Ω ± 10% Open
W terminal : red(+) 35K Ω ± 10% Open
P terminal : red(+) N terminal : red (+)
U terminal : black(-) Open 35K Ω ± 10%
V terminal : black(-) Open 35K Ω ± 10%
W terminal : black(-) Open 35K Ω ± 10%
✽ Red(+) and black(-) are the measuring terminals of multi tester.
U terminal V terminal W terminal
P terminal
U,V,W connector
N terminal
U terminal V terminal W terminal
DC connector
U,V,W connector
P terminal
N terminal
LGE Internal Use Only