Haier 1U71S2SG1FA Service Manual

Also see for 1U71S2SG1FA: Installation manual Service manual Installation manual

Contents

175RecoveyDuring maintenance or scrapping, the refrigerant inside the refrigeration system needs to be cleared. It isrecommended that the refrigerant be cleared thoroughly.The refrigerant can only be charged into a dedicated cylinder, the capacity of which shall match with the refrigerantamount charged in the whole refrigeration system. All cylinders to be used are designated for the recoveredrefrigerant and labeled for that refrigerant (Dedicated Cylinder for Refrigerant Recovery). The cylinders shall beequipped with pressure relief valves and stop valves under favorable state. The empty cylinder shall be vacuumizedbefore usage and be kept under normal temperature.The recovery equipment shall always be under favorable working state, and be equipped with operationinstructions, to facilitate information search. The recovery equipment shall be applicable to the recovery offlammable refrigerant. Moreover, weighing apparatus under available state with measurement certificates shall beequipped. In addition, removable attachment joints free from leakage shall be used as the hose, and shall alwaysbe under favorable state. Whether the recovery equipment is under favorable state and is properly maintained andwhether all the electrical components are sealed shall be checked before usage, to avoid fire or explosion in caseof refrigerant leakage. If you have any question, please consult the manufacturer.The refrigerant recovered shall be delivered back to the manufacturer in appropriate cylinders, with transportinginstructions being attached. Mixing of refrigerant in recovery equipment (especially the cylinders) is notallowed.During transporting, the space in which the flammable refrigerant air conditioners are loaded cannot be sealed.Anti-static measures shall be taken for the transporting vehicles. Meanwhile, during the transporting loading andunloading of air conditioners, necessary protective measures shall be taken, to protect the air conditioner frombeing damaged.During removal of the compressor or clearing of the compressor oil, it shall be guaranteed that the compressor isvacuumized to a proper level, to ensure no residual flammable refrigerant is left inside the lubricating oil. Thevacuumizing shall be completed before the compressor is delivered back to the manufacturer. The vacuumizingcan only be accelerated by heating the compressor housing through electrical heating. Safety shall be guaranteedwhen the oil is discharged from the system.disassembled with a pipe cutter, and the disassembly must be carriedout around a ventilation opening.Carefu y read the fo owing information in order to operate the air conditioner correctly.Below are listed three kinds of Safety Precautions and Suggestions.WARNINGIncorrect operations may result in severe consequences of death or serious injuries.CAUTION Incorrect operations may result in injuries or machine damages; in some cases may cause seriousconsequences.INSTRUCTIONS: These nformat on can ensure the correct operat on of the machine.The following safety symbols are used throughout this manual::Ind cates an action that must be avoided.:Ind cates that mportant nstruct ons must be followed.:Ind cates a part which must be grounded.:Beware of electric shock (This symbo is disp ayed on the main unit labe.)After completing installation, test the unit to check for installation errors. Give the user adequate instructionsconcerning the use and cleaning of the unit according to the Qperation Manual.