Diagnosis And Solution - Toyotomi MTN-MTG A128FS Service Manual

9.2 Diagnosis and Solution

9.2.1 Indoor fan speed out of control diagnosis
Shut off the power supply and turn on it 5s later
The unit does not work normally
Turn off the unit, rotate the cross
fan. Does it rotate freely?
Yes
Is the indoor fan motor connector and
connection good?
Yes
Is the voltage being applied to the fan
motor?
No
Replace the indoor PCB
No
Disassemble the connection between
fan and motor, check if the bearing is
normal. If not, change the bearing. If
yes, follow the below step.
Yes
50
Replace the fan motor