4. Trouble Shooting
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Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
■
27/30/40k
LED02M
LED02M
U,V,W CONNECTOR
LED01M
LED01M
U
V
W
U
V
W
LED02M
LED01M
CAUTION
In case that the control box is opend and before checking electrical parts, it should be checked that the
LED 01M, 02M turned off(wait 7 minutes after main power OFF), otherwise it may cause electrical shock.
1. Wait until inverter PCB DC voltage is discharged after main power off.
2. Pull out V, V, W COMP connector.
3. Set multi tester to resistance mode.
4. If the value between P and N terminal of IPM is short(0
Ω
) or open(hundreds M
Ω
), 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).
27
26
25
24
23 22 21
P
U
V
W
Nu Nv Nw
0.4 ~ 0.6 V
27
26
25
24
23 22 21
P
U
V
W
Nu Nv Nw
0.4 ~ 0.6 V
PFC_IPM chec
U, V, W
➔
R S
Summary of Contents for Multi-Inverter Type
Page 123: ...P NO MFL36552501 APRIL 2008 ...
