Fujitsu ASU18RLF Service Instructions Manual page 94

SERVICE PARTS INFORMATION 5
Indoor unit fan motor
Test 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.
Test 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.
For Compact Wall Mount, Wall Mount Type
Pin number Terminal function
(wire color) (symbol)
1 (Blue) 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)
For Compact Cassette Type
Pin number Terminal function
(wire color) (symbol)
1 (Red) DC voltage (Vm)
No function
2
Control voltage (Vcc)
3 (White)
4 (Black) Ground terminal (GND)
5 No function
6 No function
7 (Yellow) Speed command (Vsp)
8 (Brown) Feed back (FG)
For Floor Type
Pin number Terminal function
(wire color) (symbol)
1 (Blue) Feed back (FG)
2 (Yellow)
Speed command (Vsp)
3 (White) Control voltage (Vcc)
4 (Black)
Ground terminal (GND)
5 No function
6 No function
7 (Red) DC voltage (Vm)
For Slim Duct Type
Pin number Terminal function
(wire color) (symbol)
1 (Blue) 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)
02-54