Outdoor Unit Fan Motor Driver Abnormal; Check The Wiring Connection; Replace Fan Motor - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 56
OUTDOOR UNIT Error Method:
Outdoor Unit Fan Motor Driver
Abnormal
Detective Actuators:
Driver PCB
Fan motor
Main PCB
Forecast of Cause :
1. Driver PCB defective
4. Lose connection or disconnecting wire
Check Point 1 : Check the wiring connection
Check Fan motor to Driver PCB wiring connector disconnection, open
Check blown fuse of DC FAN motor (5A FUSE)
Check Driver PCB to Capacitor wiring connector disconnection, open
Check Main PCB to Driver PCB wiring connector disconnection, open
OK
Check Point 2 : Check DC input power of Driver PCB
Check the DC voltage of CN759 is within 15V+ 10%. Refer to the service parts info 5
>> If it is abnormal, replace Main PCB.
(When Main PCB is replaced, set up the original setting by Rotary, Dip, and Push SW)
OK
Check Point 3 : Replace Driver PCB
Check the appearance and condition of mounting of Driver PCB.
Change Driver PCB and release the error.
Check if the error reoccurs on a test run.
OK
Check Point 4 : Replace Fan motor
Check the winding resistance of Fan motor.
Change Fan motor and 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. 9
Outdoor Unit : E. 9 7. 9
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 9 7
Detective details:
When Driver PCB detects the following abnormalities,
the error signal is output.
Driver PCB defective
Fan motor defective (Layer short)
Main PCB defective (DC output abnormal)
Lose connection or disconnecting wire
2. Fan motor defective
-
04-65
Filter LED Continuous Flash.
3. Main PCB defective