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SAMSUNG ELECTRONICS
9-2-3 Indoor fan motor speed detecting error (BLDC fan)
Indoor display
7 SEG DISPLAY DESCRIPTION
C154 Indoor fan error
: LAMP ON : LAMP OFF : LAMP BLINK
1. Checklist :
1) Is the indoor units fan motor properly connected with the connector(CN900)?
2) Is the AC voltage correct?
2. Troubleshooting procedure
NO
YES
Power o and SeparatetheFan motorwire
from CN72 onIndoorPBA
ExchangetheFan
motor
YES
YES
NO
YES
YES
Doesthe fanrotate?
Is the fanerrorappeared again?
Is there shortamong
eachpin #1~#6
Is the voltage of CN72 #1-#3 over250Vdc
Is the voltage of CN72
#3-#5 and #3-#6 within1Vdc~15Vdc during
theoperation?
Restartafter power o.
Reassemblethe fanwire and input the poweragain
PBA problem orMotorproblem
Change the PBA firstand check theoperation
Exchangethe Fan motor
NO
NO
NO
Terminatethe
service
Follow the check procedure of Indoorunit
power supply errorcheck
Exchangethe Indoor PBA
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