LG ARUN Series, Руководство по обслуживанию

Страница: 69 / 134

- 69 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Checking Method for Key Components
2.6 Fan IPM Checking Method
2.7 UW1 chassis(2 Fan)
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 (0
Ω
) or tens K
Ω
, PCB needs to be replaced (IPM dam-
aged).
5. In case the measured value is open(hundreds K
Ω
), measure resistance mode, and the value should be within
35 K
Ω
±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.
✽
Red(+) and black(-) are the measuring terminals of multi tester.
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%
U,V,W connector
U terminal V terminal W terminal
U,V,W connector
U terminal V terminal W terminal
P terminal
N terminal
P terminal
N terminal
DC connector