Fujitsu AO*G09LTCN, Service Instructions Manual

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SERVICE PARTS INFORMATION 5
Check Point 1 : Check rotation of Fan
Outdoor unit fan motor
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 "Vm" and "GND" terminal.
(Vm: DC voltage, GND: Earth terminal)
>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.
Pin number
(wire color) Terminal function
(symbol)
1 (Red)
2
3
4 (Black)
5 (White)
6 (Yellow)
7 (Brown or Blue)
DC voltage (Vm)
No function
No function
Earth terminal (GND)
Control voltage (Vcc)
Speed command (Vsp)
Feed back (FG)
SERVICE PARTS INFORMATION 4
Check Point 1 : Check rotation of Fan
Indoor unit fan motor
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)
Terminal function
(symbol)
1 (Blue)
2 (Yellow)
3 (White)
4 (Black)
5
6 (Red)
Feed back (FG)
Speed command (Vsp)
Control voltage (Vcc)
Earth terminal (GND)
No function
DC voltage (Vm)
02-33