• If the PROGRAM DRY OPERATION is usedwhen the indoor temperature is low, frost formsthe heat exchanger of the indoor unit. In this case,the air conditioner automatically switches to theDEFROST OPERATION for a while.The low fan speed or a gentle wind is used toprevent the discharge of melt water.SOUND PRESSURE LEVEL• Sound pressure level is less than 70 dB(A).7. OPTIMUM OPERATIONObserve the following precautions to ensure the airconditioner operates.• Prevent direct sunlight from the window byusing curtains or blinds during the COOLINGOPERATION.• Keep doors and windows closed. If the doors andwindows remain open, room air will flow out anddecrease the effect of cooling and heating.• Never place objects near the air inlet and the airoutlet of the air conditioner. It may decrease theeffect or stop the operation.• Set the airflow flap of the air discharge grillehorizontally not to obstruct the wind.Otherwise, the wind will not come out and afailure may result.• Adjust the room temperature properly for acomfortable environment. Avoid excessiveheating or cooling.Not doing so wastes electricity.• When the display shows “ ” or “Time to cleanfilter”, ask a qualified service person to clean thefilters.(Refer to 8. MAINTENANCE on this page.)Operating the indoor unit with stained air filtermay decrease capacity or cause malfunction.• Install TVs, radios, and stereos 1 m or more awayfrom the indoor unit and remote controller.Images may become fuzzy and noise may begenerated.• Turn off the power circuit breaker when it is notin use for a long period. When the power circuitbreaker is turned on, small amount of power isconsumed even if the air conditioner is not inoperation. (*1)Turn off the power circuit breaker for savingenergy. When reoperating, turn on the powercircuit breaker 6 hours before operation forsmooth running.(Refer to 8. MAINTENANCE on this page.) (*2)*1 The consumed power while the outdoor unit isnot in operation depends on the model.*2 The setting before the power circuit breaker iscut off is stored. (The timer setting is cleared.)• Use the TIMER OPERATION effectively.It takes some time until the indoor temperaturereaches the set temperature. It is advisable tostart operation in advance using the TIMEROPERATION.8. MAINTENANCE(FOR SERVICE PERSONNEL)ONLY A QUALIFIED SERVICE PERSON ISALLOWED TO PERFORM MAINTENANCEWARNING• Do not use flammable gas (such as hairsprays and insecticides) near the air condi-tioner.• Do not wipe the air conditioner with benzineor thinner.It may cause cracks, electric shocks or a fire.CAUTION• Do not wash the air conditioner with water.It may cause electric shocks or a fire due toleakage.• Make sure to turn off the air conditioner whentaking care of the air conditioner and discon-nect the power supply breaker.Unless the power supply is disconnected, itmay cause electric shocks and injuries.• When working at a high place, give caution toyour footing.If the scaffold is unstable, it may cause inju-ries due to fall and stumbling.HOW TO CLEAN THE AIR FILTERWhen the remote controller indicates “ ” or“Time to clean filter”, clean the air filter.• It indicates after running for a certain time.7 English