Fujitsu ASU18RLF Service Instructions Manual page 75

Trouble shooting 30
OUTDOOR UNIT Error Method:
Outdoor Unit Fan Motor Error
Detective Actuators:
Outdoor unit main PCB circuit
Outdoor unit fan motor
Forecast of Cause:
1. Fan rotation failure
4. Outdoor unit fan motor failure
Test 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
Test 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
Test 3 : Check Outdoor unit fan motor
Check Outdoor unit fan motor. (PARTS INFORMATION 6)
>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.
OK
Test 4 : Check Output Voltage of Main PCB
Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector)
RED
1 1
2 2
3 3
BLACK
4 4
CN243
WHITE
5 5
YELLOW
6 6
BROWN
7 7
If the voltage is not correct, replace Main PCB.
(SERVICE PARTS INFORMATION 10)
Indicate of Display:
Indoor Unit
Operation lamp : 9 time Flash
Timer lamp
ERROR CODE : [E : 97]
Detective details:
When outdoor unit fan rotation speed is less than 100 rpm in 20 seconds
after fan motor starts, fan motor stops.
After fan motor restarts, if the same operation within 60 sec is repeated
3 times in a row, compressor and fan motor stops.
If and
permanently.
2. Motor protection by surrounding temperature rise
Read wire
FAN MOTOR
Red - Black
FM
White - Black
02-35
Outdoor Unit
A
: 7 time Flash
9
: Light ON
repeats 5 times in a row, compressor and fan motor stops
3. Main PCB failure
DC voltage
260 - 400V
15 1.5V
Monitor
B C D E F
7
: Light OFF n : n time blinking