LG AMNW07GDBL1 Service Manual page 85

Part 5. Trouble Shooting
Display
Title
code
Input voltage
25
■ 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 ➔ 230V±10%)
2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
< Input Power Source Check Point >
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Only for training and service purposes
Cause of error
• Abnormal Input voltage
(140Vac , 300Vac)
No
Check L~N Voltage is 230V±15%
No
Replace inverter PCB assembly
- 84 -
Check point & Normal condition
• Check the power source.
• Check the components.
LGE Internal Use Only