LG ARNU Series - Page 259

Troubleshooting Guide
- 259 -
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■ Error diagnosis and countermeasure flow chart
1. Input voltage is abnormal(T-N)
2. Outdoor unit main PCB defect
Error
No.
Error Type Error Point Main Reasons
The power supply input
voltage tolerance is more
or less than allowable
standard
Low / over voltage of main
PCB input
25(Main)
147(Sub1)
149(Sub2)
171(Sub3)
Is input voltage of main
PCB (T-N) 190V~250V ?*
No
Check input power from building
is supplied correctly or not
Yes
Replace main PCB
* Check voltage at outdoor T/Block(220V)