2
5
10.3
Diagnostic chart
After energizing, no indicator is lighted and the air conditioner can’t be operated.
After energizing , the air conditioner can not be operated .
Check if AC 220V power supply outputs to indoor PCB .
Check if AC 220V exists at the primary coil of transformer.
Yes
YES
No
Check if AC 14.5V exists at the secondary coil of transformer .
Indoor PCB is defective.
Take off the secondary plug of transformer , and then check if AC
14.5V exists at the secondary coil of transformer.
No
Yes
Yes
Indoor PCB is defective.
Indoor PCB is defective.
No
