4. Trouble Shooting
- 116 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
40
C/T
Sensor Error
• Initial current error
• Malfunction of current detection circuit.
(Open / Short)
• The voltage of "C01N" Is 4.0Vdc(25A) .
• Check CT Sensor output voltage : 2.5Vdc
±5%
Display
code
Title
Cause of error
Check point & Normal condition
Tester
CT Sensor Output
(at the INVERTER PCB)
<INVERTER PCB>
INPUT
INPUT
VOL
VOL TAGE INV
AGE INV
GND
GND
COMP
COMP CURRENT
CURRENT
U,V
U,V,W
,W
<INPUT VOLTAGE Check Point>
INPUT
VOL TAGE INV
GND
COMP CURRENT
U,V,W
■
Error Diagnosis and Countermeasure Flow Chart
No
Check the input voltage source
(Is nomal the offset of R-N,T-N voltage)
Is CT Sensor Output is right?
No
If the CT Sensor output is not 2.5Vdc
°
æ5%
Replace the Inverter PCB
Yes
Yes
Recheck the Inverter PCB and
installation condition
Is input voltage normal?
Summary of Contents for Multi-Inverter Type
Page 123: ...P NO MFL36552501 APRIL 2008 ...
