OK
OK
OK
1. Driver PCB defective 2. Fan motor defective 3. Main PCB defective
4. Lose connection or disconnecting wire
Driver PCB
Fan motor
Main PCB
Check Point 1 : Check the wiring connection
Check Fan motor to Driver PCB wiring connector disconnection, open
Check Main PCB to Driver PCB wiring connector disconnection, open
Check Driver PCB to Capacitor wiring connector disconnection, open
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)
Check Point 4 : Replace Fan motor
Indoor Unit : Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
Outdoor Unit : E. 9 7. 9
Error Code : 9 U / 9 7
Outdoor Unit Fan Motor Driver
Abnormal
Trouble shooting 56 E97. 9
Indicate or Display:
Detective Actuators:
Detective details:
OUTDOOR UNIT Error Method:
Forecast of Cause :
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
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
-
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.
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.
04-65
Check blown fuse of DC FAN motor (5A FUSE)
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