Samsung AR18HSFNBWKNEU Service Manual page 84

10-2-5 Indoor fan motor speed detecting error (BLDC fan)
Indoor display
3-LED DISPLAY
LED1 LED2
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?
Reassemble the fan wire and input the power again
Is the fan error appeared again?
Is the voltage of CN72 #1-#3 over 250Vdc
Is the voltage of CN72
#3-#5 and #3-#6 with in 1Vdc~15Vdc during
the operation?
PBA problem or Motor problem
Change the PBA first and check the operation
Exchange the Fan motor
10-6
LED3
LED OFF
YES
YES
YES
YES
7-SEG DISPLAY
E154
Power off and Separate the Fan motor wire
NO
from CN72 on Indoor PBA
Is there short among
each pin #1~#6
Terminate the
NO
service
Follow the check procedure of Indoor unit
NO
power supply error check
NO
Exchange the Indoor PBA
DESCRIPTION
Indoor fan error
Exchange the Fan
YES
motor
NO
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