Carrier Crystal Plus 53KHFT 12 A6716511Df758830Bc5510C21C0Aa9De page 36

TROUBLE SHOOTING (Cont.)
TROUBLE
Air conditioner does
not heat the room
adequately.
Air conditioner stops
during heating
A slight whistling
noise is heard when is
heard when the air
conditioner starts or
stops.
Unpleasant smells
coming from the unit.
Strange noises
coming from the unit.
Water dripping inside
the room to be air
conditioned.
Malfunction appears
on the display panel &
Error Code on indoor
unit.
Leds status refers to
malfunction.
POSSIBLE CAUSES
Air flow cannot circulate freely
Dirty filters reduce air quantity
circulating.
Doors and/or windows are open.
Fan speed has been set to "Low"
Set temperature is lower in heat
mode.
Unit wrongly selected for the room
TIMER OFF function is working
Room temperature is high than set
temperature
This is due to the refrigerant
beginning to circulate or an
adjustment of the refrigerant
pressures.
Unpleasant smells can be caused
by substances accumulated in the
air filter
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.
Clogged drain
Incorrect installation
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.
Remove obstructions.
Clean air filters
Close doors and windows
Set fan speed at high speed.
Correct selected temperature.
Redefines adequate unit for the room.
Cancel TIMER OFF function
Normal operation
Normal operation
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.
Normal operation
Remove the obstructions from the
drain
Correct the installation as described in
installation manual
If checks are OK, call service center
of Carrier or one of Carrier authorized
dealers.
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SOLUTIONS