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TROUBLE SHOOTING (Cont.)
TROUBLE POSSIBLE CAUSES SOLUTIONS
Air conditioner stops during
cooling
OFF Timer operation is working Cancel Off time operation
Set temperature is lower than
room temperature
Normal operation
A slight whistling noise is
heard when is heard when the
air conditioner starts or stops.
This is due to the refrigerant
beginning to circulate or an
adjustment of the refrigerant
pressures.
Normal operation
Unpleasant smells coming
from the unit.
Unpleasant smells can be caused
by substances accumulated in
the air filter
Switch the system OFF and
contact an authorized service
center to have the filters
cleaned.
Restart unit in the ventilation
(fan only) mode and open
windows to change room air.
Strange noises coming from
the unit.
Occasionally the unit can emit
some strange short noises during
operation or when it has stopped.
These are generally due to the of
temperature changes on the
plastic parts.
Normal operation
Water dripping inside the room
to be air conditioned.
Clogged drain Remove the obstructions from
the drain
Incorrect installation Correct the installation as
described in this manual
Unit installed without the proper
tilt to the outside
Correct the tilting as described
in this manual
Defect code appears
Defect code Er appears on the
display of electronic control
panel of the unit
Room air sensor
Call carrier service and
maintenance center or Carrier
authorized dealer.
Defect code En appears on the
display of electronic control
panel of the unit
Indoor coil sensor Call carrier service and
maintenance center or Carrier
authorized dealer.
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