Introduction SiUS34-801A_bvii1. Introduction1.1 Safety ConsiderationsCautions andWarningsRead these SAFETY CONSIDERATIONS carefully before installing air conditioning equipment, and besure to install it correctly. After completing the installation, make sure that the unit operates properly duringthe start-up operation.Instruct the customer how to operate and maintain the unit.Inform customers that they should store this Installation Manual with the Operation Manual for future ref-erence.Always use a licensed installer or contractor to install this product. Improper installation can result in wateror refrigerant leakage, electrical shock, fire, or explosion.Meanings of DANGER, WARNING, CAUTION, and NOTE Symbols:DANGER ............... Indicates an imminently hazardous situation which, if not avoided, will result indeath or serious injury.WARNING ............. Indicates a potentially hazardous situation which, if not avoided, could result indeath or serious injury.CAUTION .............. Indicates a potentially hazardous situation which, if not avoided, may result inminor or moderate injury. It may also be used to alert against unsafe practices.NOTE .....................Indicates situations that may result in equipment or property-damageaccidents only. Be sure to read the following safety cautions beforeconducting conducting repair work.1.1.1 Caution in RepairWarningBe sure to disconnect the power cable plug from the plug socket beforedisassembling the equipment for a repair.Working on the equipment that is connected to a power supply can cause anelectrical shock.If it is necessary to supply power to the equipment to conduct the repair orinspecting the circuits, do not touch any electrically charged sections of theequipment.If the refrigerant gas discharges during the repair work, do not touch thedischarging refrigerant gas.The refrigerant gas can cause frostbite.