Indoor Fan Speed Has Been Out Of Control(Ac Fan Motor) - Heat Controller A-VMH18DC-1 Service Manual

Heat Controller, Inc.

9.3.1.5 Indoor fan speed has been out of control(AC fan motor)

Shut off the power supply
and turn it on 5 seconds
later.Is it still displaying
the error code?
S h u t o f f t h e p o w e r
supply, rotate the cross
fan by hand. Does it
freely?
rotate properly?
Check the wires of
fan motor. Are all the
connections good?
Check the resistance value of
indoor fan motor, is it normal?
Replace indoor PCB.
No
Yes
No
Yes
No
Yes
Yes
VMH SerieS
The unit operates normally.
Disassembly the
connection between
fan and motor, check if
the bearing is normal?
Correct the connections
Correct the connections.
per wiring diagram.
No
31
No Replace the bearing.
Yes
Replace indoor fan motor.
Service Manual