LG Multi-Inverter Service Manual page 84

Display
Title
code
Input voltage
25
I Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal ?
Yes
Is Inverter PCB Normal?
Yes
Recheck power and
installation condition
Check Point
1. Check the Input Voltage (L–N ➔ 220V±10%)
2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
< Input Power Source Check Point >
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Cause of error
• Abnormal Input voltage
(140Vac , 300Vac)
No
Check L~N Voltage is 220V±15%
No
Replace inverter PCB assembly
- 83 -
4. Trouble Shooting
Check point & Normal condition
• Check the power source.
• Check the components.
LGE Internal Use Only