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31
TROUBLE
SHOOTING (Cont.)
TROUBLE
POSSIBLE CAUSES
SOLUTIONS
Air conditioner does
not heat the room
adequately.
Air flow cannot circulate freely Remove
obstructions.
Dirty filters reduce air quantity
circulating.
Clean air filters
Doors and/or windows are open.
Close doors and windows
Fan speed has been set to “Low”
Set fan speed at high speed.
Set temperature is lower in heat
mode.
Correct selected temperature.
Unit wrongly selected for the room Redefines adequate unit for the room.
Air conditioner stops
during heating
TIMER OFF function is working
Cancel TIMER OFF function
Room temperature is high than set
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
installation manual
Malfunction appears
on the display panel
of indoor unit.
Leds status refers to
malfunction.
Before contacting service center of
Carrier or one of Carrier authorized
dealers, make the following checks:
Air filters are clean.
Air circulation of indoor unit
is not obstructed.
Air circulation of outdoor
unit is not obstructed.
If checks are OK, call service center
of Carrier or one of Carrier authorized
dealers.