4，Malfunction code：F4 （the indoor fan motor fault）
Shut off the power
Take out the plug from the indoor PCB. Then test the
every winding resistance (the normal value: the main
winding is 273Ω. the auxiliary winding is 343Ω) Fig.12
N
The indoor fan motor is bad，
then please change it
Y
connect the motor plug with the indoor PCB again and
turn on. Then test the feedback terminal to ground wire
voltage whether it is normal (the normal voltage is
increased gradually from 0 to +2.4VDC) Fig.10
N
The indoor fan motor is bad，then
please change it。
Y
The indoor PCB is bad. Please change it
Check the indoor fan whether it is smooth
N
1. If the fan is bad and change it
2. The bolt what fix the indoor fan is
loose. Please screw it again
3. There are any dirt in the indoor
fan. Please clean it 。
Y
The faulty cause：
1、the fan motor is blocked or turns
abnormally；
2、the motor wire is loose or contacts
ill
3、the indoor fan motor has been
damaged
4、the indoor PCB is bad
Fig. 12、the indoor fan motor
The main winding resistance （ the motor wire:
black-white 273Ω） the auxiliary winding resistance
（the motor wire: red-white 343Ω）
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