Midea MSV1-09HRDN1 Service Manual page 41

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.
Check if AC 14.5V exists at the secondary coil of transformer .
Take off the secondary plug of transformer , and then check if AC
14.5V exists at the secondary coil of transformer.
Indoor PCB is defective.
37
Yes
YES
No
No
Service manual
No
Indoor PCB is defective.
Yes
Yes
Indoor PCB is defective.