Panasonic U-4LE1E5 Service Manual page 128

3. Mini VRF System Alarm Codes
P22 Outdoor Fan Motor Error
1. Error Detection Method
• It is judged an error when the outdoor fan motor's rotating signal cannot be detected normally.
2. Error Diagnosis
1 Wiring
1-1
2 Outdoor
fan motor
2-1
3 Outdoor
control
3-1
PC board
3-2
3-3 If there is nothing particularly out of the ordinary, see what happens.
5
Are the connectors "CN-FMA", "CN-FMB", "CN-FM1", and
"CN-FM2" firmly connected to the outdoor control PC board
(lock engaged)?
Disconnect the connectors "CN-FMA", "CN-FMB", "CN-FM1",
and "CN-FM2" from the outdoor control PC board and rotate
the outdoor fan by hand; does it rotate freely?
(Check the outdoor fan motor lock)
Turn the power on and run the unit again; is P22 triggered
again? Or can you see or hear anything that is obviously
wrong in its rotation?
Replace the outdoor control PC board. (If it fails to operate normally even after replacing
the outdoor control PC board, replace the outdoor fan motor.)
5 - 48
Mini VRF SYSTEM
Trouble Diagnosis
Yes 2-1
No Correct the connector
connections
Yes 3-1
Replace the outdoor
No
fan motor
Yes 3-2
No 3-3