Fujitsu AB*30LBAG series Service Instruction page 64

Trouble shooting 17
OUTDOOR UNIT Error Method:
Outdoor Unit Fan Motor Error
Detective Actuators:
Outdoor Unit Main PCB Circuit
Outdoor Fan Motor
Forecast of Cause:
1. Fan rotation failure 2. Motor protection by surrounding temperature rise 3. Main PCB failure
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.
OK
Check Point 2 : Check ambient temp. around motor
Check excessively high temperature around the motor.
(If there is any surrounding equipment that causes heat)
>>Upon the temperature coming down, restart operation.
OK
Check Point 3 : Check Output Voltage of Main PCB
Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector)
AB*30/ 36LBAG
RED
1
2
3
BLACK
CN800 4
WHITE
5
YELLOW
6
BROWN
7
Read wire
Red - Black
White - Black
If the voltage is not correct, replace Main PCB.
Indicate or Display:
Indoor Unit
Outdoor Unit : LED 15 (Fan motor 1) / 16(Fan motor 2) times blink
Detective details:
When outdoor fan rotation speed is less than 100rpm in 20 seconds
after fan motor starts, fan motor stops.
After fan motor restarts, if the same operation within 60sec is repeated
3 times in a row, compressor and fan motor stops.
If
permanently.
AU*45LBAG
FAN MOTOR 1
CN800
FM
DC voltage
CN801
300 400V
∼
15 1.5V
: Operation LED: Blink, Timer LED: 14 times blink,
Vertical swing LED: OFF
and repeats 5 times in a row, compressor and fan motor stops
RED
1
FAN MOTOR 1
2
3
BLACK
FM
4
WHITE
5
YELLOW
6
BROWN
7
RED
1
FAN MOTOR 2
2
3
BLACK
FM
4
WHITE
5
YELLOW
6
BROWN
7
07-18