Samsung AC052FCADEH - Indoor FAN Error

Samsung Electronics 4-21
Indoor unit display
4way
X (Operation) X (Defrost) (Timer) X (Filter)
1way
X (Operation) X (Defrost) X (Reservation) (Fan) X (Filter)
Symptom
Indoor unit fan does not run /Runs at excessive high speed and stops
Failure
Check if the motor connector is disconnected/ check the motor fan assembly status
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 ᐯ׳ᐱ :
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.
↓ ↓
1 2 3 4 5 6
[ 4-way cassette type ]
Check the normal
operation.
No
Is the motor connector(CN73 or CN44)
disconnected from the PCB?
Connect the
connector to PCB.
Yes
No
[After the start of operation of FAN]
Motor ᐯ׳ᐱ : Is voltage of
AC 220V displayed?
Check the PCB and replace it.
Yes
Check the motor and
replace it.
[1 way cassette type]