Troubleshooting
Samsung Electronics 4-23
Indoor unit display
X (Operation) X (Defrost) (Timer) X (Filter)
Symptom Indoor unit fan does not run /Runs at excessive high speed and stops.
Failure
. Motor connector break away
. Indoor unit FAN does not run : Defective motor or PBA
4-3-3 Indoor FAN error
Check the normal
operation.
No
Is the motor connector(CN73)
disconnected from the PCB?
Connect the
connector to PCB
Yes
No
Does the motor rotates when operating?
Motor ③↔⑤ :
Is voltage of DC 0V~DC 6V displayed?
Check the PCB and
replace it
Is the RPM of motor less
than 120?
Yes
During operation or Operation at the beginning :
E154 is displayed.
No
Check the motor and
replace it.
Yes
Ex) Depending on FAN RPM,
voltage of DC 0V~DC 6V is
output.
↓↓
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