Fujitsu ARTG45LHTB Service Instruction

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: Ground terminal)
>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.
02-42
Pin number
(wire color)
Terminal function
(symbol)
1 (Brown)
2 (Yellow)
3 (White)
4 (Black)
5
6 (Red)
Feed back (FG)
Speed command (Vsp)
Control voltage (Vcc)
Ground terminal (GND)
No function
DC voltage (Vm)
Check Point 1 : Check resistance of indoor fan motor
Check each winding resistance of the motor
>>If Resistance value is abnormal, replace motor.
Lead wire color
Resistance value
(20°C)
White - Red
Red - Black
Red - Violet
Violet - Blue
7.73 + 7%
7.08 + 7%
3.80 + 7%
3.80 + 7%
-
-
-
-
For AR *G45/ 54LHTA
For other indoor unit
(AC)
Thermal protector
Pr
Violet (Int.1)
Blue (Low)
Red (Hi)
Black
White
°C

Fujitsu ARTG45LHTB Specifications

General

Brand	Fujitsu
Model	ARTG45LHTB
Category	Air Conditioner
Language	English