Indoor Fan Motor Speed Detecting Error - Samsung AR09FSSYAWTNEU Service Manual

12-2- Indoor an motor speed detecting error
Indoor fan motor speed detecting error (BLDC fan)
n I o d r o d s i l p y a
1.Checklist :
1) Is the indoor units fan motor properly connected with the connector(CN72)?
2) Is the AC voltage correct?
2. Troubleshooting procedure
Restart r power o
Does the fan rotate?
YES
Reassemble the fan wire and inpu he power again
Is the fan error appeared again?
YES
Is the voltage of CN72 #1-#3 over
250Vdc
YES
Is the voltage of CN72 #3-#5 and
#3-#6 with in 1Vdc~15Vdc during
the opera on? the opera on?
YES
PBA problem or Motor problem
Change the PBA rst and check the opera on
Exchange the Fan motor
1.set power on,check the voltage of the CN72(PIN1,PIN3)
the voltage is over 250VDC.
Samsung Electronics
1 E 4 5 n I o d r o f n a e r r r o
NO
NO
Terminate the
service
NO
NO
Power o and Separate the Fan motor wire from
CN72 on Indoor PBA
Is there short among each pin
#1~#6
NO
Follow the check procedure of Indoor unit power
supply error check
Exchange the Indoor PBA
2.set power on,check the voltage of the CN72(PIN3,PIN5)
the voltage is between 1VDC and 15VDC
YES
Exchange the
motor
12-2-5