Airwell VVFA Series Service Manual page 59

[71-0,71-1 ] DC motor blocked
Rotate fan motor by
hand to check if there
is obviously fiction
Check the motor and
PCB connection is well
Forced the fan in low speed,
measure if it has alternating
voltage between FG and GND
Replace the outdoor PCB
No
Yes
Yes
Yes
No
No
57
Replace fan motor
Re-connect
Replace the motor