Indoor Unit Fan Motor - Fujitsu AU*G36LRLA Service Instruction

SERVICE PARTS INFORMATION 4

Indoor unit fan motor

For AR *G45/ 54LHTA
Check Point 1 : Check resistance of indoor fan motor
Check each winding resistance of the motor
>>If Resistance value is abnormal, replace motor.
Thermal protector
°C
Pr
For other indoor unit
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: Ground terminal)
>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
Terminal function
Pin number
(symbol)
(wire color)
1 (Brown) Feed back (FG)
2 (Yellow) Speed command (Vsp)
3 (White) Control voltage (Vcc)
4 (Black) Ground terminal (GND)
5 No function
6 (Red) DC voltage (Vm)
Blue (Low)
Lead wire color
Violet (Int.1)
White - Red
Red (Hi)
Red - Black
Red - Violet
(AC)
Black
Violet - Blue
White
02-42
Resistance value
(20°C)
7.73 + 7%
-
7.08 + 7%
-
3.80 + 7%
-
3.80 + 7%
-