Engineering manual
305
Indoor unit - No feedback from IFAN motor
Remote controller display A3
Possible reason
Unit fan is blocked
Motor wire is not connected well
IFAN motor driver fault
Unit electrical board abnormal
Diagnostic
Yes
No
No
Yes
Normal
Abnormal
Does motor wire
connect well to the
electrical board?
Change a new
electrical board and
restart the unit?
Is the indoor fan
blocked?
Clear the obstacle; make
sure units fan can work
freely. Switch on and run
the unit again
Connect well the main bus
wire and restart the unit
Change a new motor
System normal
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