Multi F Four-Way Ceiling Cassette Service Manual

Part 5. Trouble Shooting
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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check Point
1. Check the Input Voltage (L–N ➔ 230V±10%)
2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
25
Input voltage
• Abnormal Input voltage
(140Vac , 300Vac)
• Check the power source.
• Check the components.
Display
code
Title Cause of error Check point & Normal condition
Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Is input voltage normal ?
No
Check L~N Voltage is 230V±15%
Yes
< Input Power Source Check Point >
Recheck power and
installation condition
Yes
■ Error Diagnosis and Countermeasure Flow Chart