28Please check again before calling a repair person.Check again.Case CheckThe air conditioner does notoperate.(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 theindoor and the outdoor units?• Is the temperature setting appropriate?• Are the windows and doors closed?• Are the air flow rate and the air direction set appropriately?• Is the unit set to the INTELLIGENT EYE mode?(page 18.)Operation stops suddenly.(OPERATION lamp flashes.)• Are the air filters clean?• Is there anything to block the air inlet or the outlet of theindoor and the outdoor units?Clean the air filters or take all obstacles away and turn thebreaker OFF. Then turn it ON again and try operating the airconditioner 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 unitsconnected to outdoor units in the multi system?If not, set all indoor units to the same operation mode andconfirm that the lamps flash.Moreover, when the operation mode is in “AUTO”, set allindoor unit operation modes to “COOL” or “HEAT” for amoment and check again that the lamps are normal.If the lamps stop flashing after the above steps, there is nomalfunction.(page 22.)An abnormal functioninghappens during operation.• The air conditioner may malfunction with lightning or radiowaves. Turn the breaker OFF, turn it ON again and tryoperating the air conditioner with the remote controller.