Fujitsu AOUG09LMAS1, Service Manual

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4-4. Indoor unit fan motor
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
NOTE: Vm: DC voltage, GND: Earth terminal
→ If they are short-circuited (below 300 kΩ), replace indoor fan motor and controller PCB.
Pin number
(wire color)
Terminal function
(symbol)
1 DC voltage
4 Earth terminal
1 (Red) DC voltage (Vm)
2 No function
3 No function
4 (Black) Earth terminal (GND)
5 (White) Control voltage (Vcc)
6 (Yellow) Speed command (Vsp)
7 (Brown)) Feed back (FG)
4-4. Indoor unit fan motor
- (03-38) -
4. Service parts information
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