Fault E3: Fan speed incorrect
Switch the unit off
for 5 seconds. Is the
fault still shown on
the display?
NO
The unit operates normally.
YES
Switch the unit off.
Check whether the
fan rotor can be
turned easily by
hand.
NO
Check the bearing between the fan rotor
and the fan motor. Is it OK?
YES
YES
NO
Check all electrical
connections to the
motor. Are these
correctly imple-
mented?
NO
Replace the con-
nections.
Replace the fan
motor
Replace the
bearing.
YES
Check the resist-
ance of the motor. Is
this normal?
NO
Replace the fan
motor
YES
The indoor unit con-
trol board is defec-
tive. Please replace.
Faults E3-E4 and F1-F3: Probe fault
Check the connection of the respective probe to
the circuit board. Are these correctly imple-
mented?
NO
Establish a proper connection.
YES
Measure the resistance of the respective probe.
Use the table for comparison. Does the probe
resistance match the value in the table?
NO
Probe defective. Please replace.
YES
Replace the respective control board.
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