Outdoor Unit Fan Motor Lock Error; Fan Rotation State Check; Fan Motor Defective; Replace Driver Pcb - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 54
OUTDOOR UNIT Error Method:

Outdoor Unit Fan Motor Lock Error

Detective Actuators:
Outdoor unit fan motor
Forecast of Cause :
1. Rotation obstruction by foreign matter
2. Main PCB to Driver PCB to Fan motor wiring, disconnection, open
3. Fan motor defective (winding open, lock)
4. Driver PCB defective
5. Main PCB defective
Check Point 1 : Fan rotation state check
Check for the absence of foreign matter around the fan.
OK
Check Point 2 : Main PCB to Driver PCB to Fan motor wiring connection state
Connector and wiring connection state check.
Check blown fuse of DC FAN motor (5A FUSE)
Cable open check. Refer to the service parts information 5
OK
Check Point 3 : Fan motor defective
Check if fan can be rotated by hand.
Motor winding resistance check
Motor operation check Refer to the service parts information 22
OK
Check Point 4 : Replace Driver PCB
Check the appearance of Driver PCB.
Change Driver PCB and release the error.
Check if the error reoccurs on a test run.
OK
Check Point 5 : Replace Main PCB
Change Main PCB and release the error.
Check if the error reoccurs on a test run.
>> If it is abnormal, replace Main PCB.
(When Main PCB is replaced, set up the original setting by Rotary, Dip, and Push SW)
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. 1
Outdoor Unit : E. 9 7. 1
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Error Code : 9 U / 9 7
Detective details:
1. When outdoor fan rotation speed is less than 100rpm in 20 seconds
after fan motor starts, fan motor and compressor stops.
2. After fan motor restarts, if the same operation is repeated
consecutively 4 times, fan motor and compressor stops permanently.
04-63
Filter LED Continuous Flash.