Fujitsu AUG12LVLB Service Instruction page 54

Trouble shooting 19
OUTDOOR UNIT Error Method:
Outdoor unit fan motor error
Detective Actuators:
Outdoor unit Main PCB
Outdoor unit fan motor
Forecast of Cause:
1. Fan rotation failure
4. Outdoor unit fan motor 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.
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.
Check Point 3 : Check Outdoor unit fan motor
Check Outdoor unit fan motor. (PARTS INFORMATION 5)
>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.
Check Point 4 : Check Output Voltage of Main PCB
Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector)
RED
1
2
3
BLACK
CN800
4
WHITE
5
YELLOW
6
BLUE
7
If the voltage is not correct, replace Main PCB.
AMP Air Conditioning
Indicate or Display:
Refer to error code table.
Detective details:
2. Motor protection by surrounding temperature rise
OK
OK
OK
FAN MOTOR
FM
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 and repeats 5 times in a row, compressor and fan motor stops
permanently.
Read wire
Red - Black
280V (AC220V-10%) ~ 373V (AC240+10%)
White - Black
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3. Main PCB failure
DC voltage
15 1.5V