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13. TROUBLE
SHOOTING
If you have problems with your room air conditioner, check this trouble-shooting guide before contacting
Carrier or Carrier certified dealer.
If the abnormality persists and cannot be solved with the given instructions, turn off the air conditioner
and does not try to turn it on again, call Carrier or Carrier certified dealer.
TROUBLE
POSSIBLE CAUSES
SOLUTIONS
After batteries have
been placed into the
remote control, the
remote control can
not operate the air
conditioner.
Batteries are exhausted or have the
wrong polarity.
Replace batteries or check
polarity.
When pressing start
button, unit does not
acknowledge signal
with a beep.
OR
When pressing stop
button, unit does not
acknowledge signal
with a beep.
Main switch is OFF.
Switch it to ON position.
Remote control batteries are exhausted. Replace
batteries.
Remote control has not been pointed
correctly to the receiver of unit.
Turn remote control OFF and
repeat the operation in the
correct direction.
There are obstacles (curtains, walls, etc.)
between the remote control and the unit
Repeat the operation after having
removed the obstacles.
Receiver on the unit or the remote
control is under intense sun radiation.
Avoid direct sun on the unit, shut
curtains or shades.
Signal transmission is obstructed by
severe interference from an
electromagnetic field.
Avoid sending signals when
computers or household
appliances (Food processors,
coffee makers, etc.) are operating
close by cellular or cordless
telephones may also interfere
with the control.
Air conditioner will
not start.
Main supply switch is OFF
Switch to ON
Fuses or main switch are blown
Replace fuses
Protection against frequent compressor
cycling is ON
Wait for 3 minutes.
Set temperature is higher than the room
temperature in the cool mode or lower
than the room temperature in heat mode.
Correct set temperature.
Air conditioner does
not cool 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 high in the cool mode. Correct selected temperature.
Incidence of strong sun rays in the room Use shut curtains or shades
Unit wrongly selected for the room
Redefines adequate unit for the
room.
Air conditioner stops
during cooling
TIMER OFF function is working
Cancel TIMER OFF function
Room temperature is lower than set
temperature
Normal operation
Ice or frost forms on
the indoor coil during
cooling
Insufficient air circulation
Remove obstructions in front of
the unit
Dirty air filters
Clean air filters
