Fujitsu AUXB04GALH Service Manual page 197

SERVICE PARTS INFORMATION 14-1
Indoor Unit Fan Motor <DC motor>
When you approach this part, please cut off the power supply and wait for a while until DC voltage has been discharged.
Check Point 1 : Check rotation of Fan
Rotate the fan by hand when operation is off.
(Check if fan is caught, dropped off or locked motor)
>>If Fan or Bearing is abnormal, replace it.
Check Point 2 : Check resistance of Indoor Fan Motor
Refer to below. Circuit-test "Vm" and "GND" terminal.
(Vm: DC voltage, GND: Earth terminal)
>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
Pin number
(wire color)
1 (Brown or Blue) Feed back (FG)
2 (Yellow) Speed command (Vsp)
3 (White) Control voltage (Vcc)
4 (Black) Earth terminal (GND)
5 No function
6 (Red) DC voltage (Vm)
Terminal function
(symbol)
04-127