Haier HSU-18HEA03/R2(DB)-I Service Manual

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Haier HSU-18HEA03/R2(DB)-I Service Manual Manual pdf 3 page image

HSU-18HEA03/R2(DB)-I IntroductionDomestic Air Conditioner11. Introduction1.1 Safety CautionsBe sure to read the following safety cautions before conducting repair work.The caution items are classified into “Warning” and “Caution”. The “Warning” items are especiallyimportant since they can lead to death or serious injury if they are not followed closely. The “Caution”items can also lead to serious accidents under some conditions if they are not followed. Therefore, besure to observe all the safety caution items described below.About the pictogramsU This symbol indicates an item for which caution must be exercised.The pictogram shows the item to which attention must be paid.This symbol indicates a prohibited action.The prohibited item or action is shown inside or near the symbol.z This symbol indicates an action that must be taken, or an instruction.The instruction is shown inside or near the symbol.After the repair work is complete, be sure to conduct a test operation to ensure that the equipmentoperates normally, and explain the cautions for operating the product to the customer.1.1.1 Caution in RepairWarningBe sure to disconnect the power cable plug from the plug socket before disassembling theequipment for a repair.Working on the equipment that is connected to a power supply can cause an electricalshook.If it is necessary to supply power to the equipment to conduct the repair or inspecting thecircuits, do not touch any electrically charged sections of the equipment.If the refrigerant gas discharges during the repair work, do not touch the dischargingrefrigerant gas.The refrigerant gas can cause frostbite.When disconnecting the suction or discharge pipe of the compressor at the welded section,UHOHDVHWKHUHIULJHUDQWJDVFRPSOHWHO\DWDZHOOYHQWLODWHGSODFH¿UVWIf there is a gas remaining inside the compressor, the refrigerant gas or refrigeratingmachine oil discharges when the pipe is disconnected, and it can cause injury.If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas canJHQHUDWHWR[LFJDVHVZKHQLWFRQWDFWVÀDPHVThe step-up capacitor supplies high-voltage electricity to the electrical components of theoutdoor unit.Be sure to discharge the capacitor completely before conducting repair work.A chargedcapacitor can cause an electrical shock.Do not start or stop the air conditioner operation by plugging or unplugging the power cableplug.Plugging or unplugging the power cable plug to operate the equipment can cause anHOHFWULFDOVKRFNRU¿UH