Fujitsu ACUH09LUAS1, Service Manual

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¢ Models: AOUH12LUAS1 and AOUH18LUAS1
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 “Vm” and “GND” terminal
NOTE: Vm: DC voltage, GND: Earth terminal
If they are short-circuited (below 300 kΩ), replace outdoor fan motor and main PCB.
1
4
5
6
7
Red
Black
White
Yellow
Brown
FM
Pin number
(wire color)
Terminal function
(symbol)
1 (Red) DC voltage (Vm)
2 No function
3 No function
4 (Black) Earth terminal (GND)
5 (→hite) Control voltage (Vcc)
6 (↔ellow) Speed command (Vsp)
7 (Brown) Feed back (FG)
4-5. Outdoor unit fan motor
- (03-52) -
4. Service parts information
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G