Fujitsu AUXB04GALH Service Manual page 200

SERVICE PARTS INFORMATION 20
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
Pin number
(wire color)
1 (Brown or Blue )
2 (Yellow)
3 (White)
4 (Black)
5
6 (Red)
SERVICE PARTS INFORMATION 21
Outdoor unit fan 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 Outdoor Fan Motor
Refer to below. Circuit-test " Winding coil resistance U, V, W."
and the Location sensor Circuit test
>>If they are other resistance value, replace Outdoor fan motor.
Pin number
(wire color)
U (Red ) - W (Black)
V (white) - U (Red)
W (Black) - V (White)
1 (Yellow) - 4 (Pink)
2 (Blue) - 4 (Pink)
3 (Orange) - 4 (Pink)
4 (Pink) - 5 (Gray)
1 or 2 or 3 - 5 (Gray)
Terminal function
(symbol)
Feed back (FG)
Speed command (Vsp)
Control voltage (Vcc)
Earth terminal (GND)
No function
DC voltage (Vm)
Terminal function
(symbol)
2.8
9.3 K
More than 1.2 K
More than 10 K
U
V
W
4 Vcc
1
Sensor -
2
circuit
3
5 (GND)
04-124