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9-2-3 Indoor fan motor speed detecting error (BLDC fan)
Indoor display
7-SEG DISPLAY
C154
LED ON
LED BLINKING
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 after power off.
Does the fan rotate?
YES
Reassemble the fan wire and input the 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 operation?
YES
PBA problem or Motor problem
Change the PBA first and check the operation
Exchange the Fan motor
DESCRIPTION
Indoor fan error
LED OFF
NO
Power o and Separate the Fan motor wire
from CN72 on Indoor PBA
Terminate the
NO
service
Follow the check procedure of Indoor unit
NO
power supply error check
NO
Exchange the Indoor PBA
51
Is there short among
YES
each pin #1~#6 ?
NO
Exchange the Fan
motor
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