Fujitsu AUXB04GALH Service Manual page 135

Trouble shooting 57
OUTDOOR UNIT Error Method:
Outdoor unit Fan motor 1(2)
undervoltage - Lack of DC Voltage -
Detective Actuators:
Outdoor unit main PCB
Forecast of Cause :
1. Power OFF, voltage drop, momentary open
2. Power supply wiring connection defective, open
3. Main PCB defective (electrolytic capacitor, DC voltage detection circuit)
Check Point 1 : Check the Power supply
Power ON?
Temporary voltage drop not generated?
Momentary open circuit not generated?
OK
Check Point 2 : Check the power line
Power supply wiring connection check
Power supply wiring open check
OK
Check Point 3 : Replace Main PCB
Electrolytic capacitor check
DC voltage detection circuit check
>>If replace Main PCB and
Indicate or Display:
E. 97.4 ( E. 98.4)
Outdoor Unit : E. 97. 4 E.98.4
Indoor Unit
Error Code
Detective details:
Low DC power supply (DC voltage 180V or less) detected
and set up orignal address
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 97
,
04-65