Samsung AC018JN4DCH/AA Service Manual page 59

Indoor unit display
Symptom
Failure
Yes
Is the RPM of motor less
than 120?
Check the motor and
replace it.
Samsung Electronics
X (Operation) X (Defrost)
Indoor unit fan does not run /Runs at excessive high speed and stops.
. Motor connector break away
. Indoor unit FAN does not run : Defective motor or PBA
During operation or Operation at the beginning :
Is the motor connector(CN73)
disconnected from the PCB?
Does the motor rotates when operating?
Yes
Is voltage of DC 0V~DC 6V displayed?
(Timer) X (Filter)
E154 is displayed.
No
No
Motor :
No
Check the PCB and
replace it
Troubleshooting
Yes
Connect the
connector to PCB
Check the normal
operation.
Ex) Depending on FAN RPM, voltage of
DC 0V~DC 6V is output.
↓ ↓
1 2 3 4 5 6
4-19