3• Do not leak refrigerant while piping work for aninstallation or re-installation, and while repairingrefrigeration parts.Handle liquid refrigerant carefully as it may causefrostbite.When Servicing• Turn the power OFF at the main power box (mains)before opening the unit to check or repair electricalparts and wiring.• Keep your fingers and clothing away from any movingparts.• Clean up the site after you finish, remembering to checkthat no metal scraps or bits of wiring have been left insidethe unit being serviced.WARNING• This product must not be modified ordisassembled under any circumstances.Modified or disassembled unit may cause fire,electric shock or injury.• Do not clean inside the indoor and outdoor unitsby users. Engage authorized dealer or specialistfor cleaning.• In case of malfunction of this appliance, do notrepair by yourself. Contact to the sales dealer orservice dealer for a repair.CAUTION• Do not touch the air inlet or the sharpaluminum fins of the outdoor unit. Youmay get injured.• Ventilate any enclosed areas when installing ortesting the refrigeration system. Escapedrefrigerant gas, on contact with fire or heat, canproduce dangerously toxic gas.• Confirm after installation that no refrigerant gasis leaking. If the gas comes in contact with aburning stove, gas water heater, electric roomheater or other heat source, it can cause thegeneration of poisonous gas.OthersCAUTION• Do not sit or step on the unit, you may falldown accidentally.• Do not touch the air inlet or the sharpaluminum fins of the outdoor unit. Youmay get injured.• Do not stick any object into the FANCASE.You may be injured and the unit may bedamaged.Check of Density LimitThe room in which the air conditioner is to beinstalled requires a design that in the event ofrefrigerant gas leaking out, its density will notexceed a set limit.The refrigerant (R410A), which is used in the airconditioner, is safe, without the toxicity or combustibilityof ammonia, and is not restricted by laws imposed toprotect the ozone layer. However, since it contains morethan air, it poses the risk of suffocation if its densityshould rise excessively. Suffocation from leakage ofrefrigerant is almost non-existent. With the recentincrease in the number of high density buildings,however, the installation of multi air conditioner systemsis on the increase because of the need for effective useof floor space, individual control, energy conservation bycurtailing heat and carrying power, etc.Most importantly, the multi air conditioner system is ableto replenish a large amount of refrigerant compared toconventional individual air conditioners. If a single unit ofthe multi air conditioner system is to be installed in asmall room, select a suitable model and installationprocedure so that if the refrigerant accidentally leaks out,its density does not reach the limit (and in the event of anemergency, measures can be made before injury canoccur).ASHRAE and the International Mechanical Code of theICC as well as CSA provide guidance and definesafeguards related to the use of refrigerants, all of whichdefine a Refrigerant Concentration Level (RCL) of25 pounds (11.3 kg) per 1,000 cubic feet (28.3 m3) forR410A refrigerant.For additional guidance and precautions related torefrigerant safety, please refer to the followingdocuments:International Mechanical Code 2012 (IMC-2012)(or more recently revised)ASHRAE 15ASHRAE 34