31
Trouble Shooting
Please check again before calling a service man.
Check again.
Case
Check
The air conditioner does not
operate.
(OPERATION lamp is off.)
• Hasn’t a breaker turned OFF or a fuse blown?
• Isn’t it a power failure?
• Are batteries set in the remote controller?
• Is the timer setting correct?
Cooling (Heating) effect is poor.
• Are the air filters clean?
• Is there anything to block the air inlet or the outlet of the
indoor and the outdoor units?
• Is the temperature setting appropriate?
• Are the windows and doors closed?
• Are the airflow rate and the air direction set appropriately?
Operation stops suddenly.
(OPERATION lamp flashes.)
• Are the air filters clean?
• Is there anything to block the air inlet or the outlet of the
indoor and the outdoor units?
Clean the air filters or take all obstacles away and turn the
breaker OFF. Then turn it ON again and try operating the air
conditioner with the remote controller. If the lamp still flashes,
call the service shop where you bought the air conditioner.
• Are operation modes all the same for indoor units connected
to outdoor units in the
multi system?
If not, set all indoor units to the same operation mode and
confirm that the lamps flash.
Moreover, when the operation mode is in “AUTO”, set all
indoor unit operation modes to “COOL” or “HEAT” for a
moment and check again that the lamps are normal.
If the lamps stop flashing after the above steps, there is no
malfunction. (page 26.)
An abnormal functioning
happens during operation.
• The air conditioner may malfunction with lightning or radio
waves. Turn the breaker OFF, turn it ON again and try
operating the air conditioner with the remote controller.
Noise interferes with television
pictures or radio sound while
the air conditioner is in
operation.
• Make sure that no television or radio sets are located close to
the indoor unit.
• Keep the television or radio sets at least 1 m away from the
indoor unit.
Attempted heating, but the unit
would not accept the
instruction.
• When selecting heating, warning beeps are heard, the main
unit operating lamp (green) blinks for 5 seconds, and the
current operating status is maintained.
Check the specifications of the outdoor unit. If the outdoor
unit is cooling only model, set the remote controller for a
cooling only model using the cooling only/heat pump switch
on the remote controller. (page 12.)
If you do not know how to switch the setting, contact the
service shop where you purchased the air conditioner.
The remote controller allows
selection of “heating” even
though the unit is cooling only
model.
Heating cannot be selected,
even though the unit is heat
pump model.
• Set the remote controller so that it is for a heat pump model by using
the cooling only/heat pump switch on the remote controller. (page 12.)
If you do not know how to switch the setting, contact the
service shop where you purchased the air conditioner.
3PEN477071-1A.book Page 31 Thursday, March 30, 2017 1:28 PM
