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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2.6 Fan IPM Checking Method
1. Wait until Comp PCB DC voltage gets discharged after the main power switch off.
2. Pull out DC Link 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 dam-
aged).
5. In case the measured value is open(hundreds KΩ), measure resistance mode, and the value should be within
2.3KΩ ±10%(25℃) as shown below table.
6. If the measured value is different from the value given in the table, PCB is needs to be replaced.
]
Red(+) and black(-) are the measuring terminals of multi tester.
P terminal : black (-)
N terminal : red (-)
U terminal : red(+)
2.3K Ω ± 10%(25℃)
3.0K Ω ± 10%(25℃)
V terminal : red(+)
2.3K Ω ± 10%(25℃)
3.0K Ω ± 10%(25℃)
W terminal : red(+)
2.3K Ω ± 10%(25℃)
3.0K Ω ± 10%(25℃)
P terminal : red(+)
N terminal : red (+)
U terminal : black(-)
3.0K Ω ± 10%(25℃)
2.3K Ω ± 10%(25℃)
V terminal : black(-)
3.0K Ω ± 10%(25℃)
2.3K Ω ± 10%(25℃)
W terminal : black(-)
3.0K Ω ± 10%(25℃)
2.3K Ω ± 10%(25℃)
U,V,W Connector
P Terminal
N Terminal
U,V,W Connector
DC Link Connector
U Terminal
V Terminal
W Terminal
U Terminal
V Terminal
W Terminal
P Terminal
N Terminal
UX3 Fan PCB
Checking Method for Key Components
Summary of Contents for ARNU05GL1G2
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