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SAMSUNG ELECTRONICS
10-2-3 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 andSeparate theFan motorwire
from CN72 onIndoor PBA
ExchangetheFan
motor
YES
YES
NO
YES
YES
Does thefan rotate?
Is thefan errorappearedagain?
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.
Reassemble the fan wireandinputthe poweragain
PBA problem orMotorproblem
Changethe PBA firstandcheck theoperation
Exchangethe Fanmotor
NO
NO
NO
Terminatethe
service
Follow thecheck procedure of Indoor unit
powersupply errorcheck
Exchange the IndoorPBA
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