Fujitsu AUXB04GALH Service Manual page 143

Trouble shooting 55
OUTDOOR UNIT Error Method:
Outdoor Unit Fan Motor Temp.
Abnormal
Detective Actuators:
Driver PCB
Forecast of Cause : 1. Rotation obstructed by foreign matter
2. Ventilation obstructed by heat exchange foreign matter
3. Excessive ambient temperature rise
4. Static pressure setting incorrect, specifIed static pressure value exceeded
5. Driver PCB defective
Check Point 1 : Check fan rotation state
Check for the absence of foreign matter around the fan
OK
Check Point 2 : Check for obstruction of ventilation by heat exchange foreign matter
Check for foreign matter on heat exchanger
OK
Check Point 3 : Check the ambient temperature
Ambient temperature not raised by the effect of other heat sources?
Discharged air not sucked in?
OK
Check Point 4 : Check the static pressure
Check if static pressure is set correctly.
Check if static pressure is not higher than the specified value.
OK
Check Point 5 : Replace Driver PCB
Check the appearance and condition of mounting of Driver PCB.
Change Driver PCB and release the error. Refer to the service parts info 5
Check if the error reoccurs on a test run.
After fixing the problem and for canceling the Error, Error Reset (F3-40) will be required after power reset
Caution
By changing of DIP SW 4-2 to ON, the Back-up operation can start when the active outdoor unit exists on the multi outdoor unit connection.
(Stand alone outdoor unit is impossible)
The following conditions will be concerned in use of back-up operation. (Please do not use the system with back-up operation for long time.)
- The operating compressor life time becomes shorter.
- The operating performance may drop due to the limited active compressor(s).
- The compressor may stop frequently by protection controlling.
*In order to keep the operating capacity, the release of the Low noise mode setting might be necessary.
Indicate or Display:
E97. 5
Outdoor Unit : E. 9 7. 5
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 9 7
Detective details:
1. When outdoor fan motor cannot operate more than 470rpm,
fan motor and compressor stops.
2. After fan motor restarts, if fan motor cannot operate at 470rpm or more,
or the same operation is repeated consecutively 3 times within 60 minutes,
fan motor and compressor stops permanently.
04-67
Filter LED Continuous Flash.