11-5. In Case of Compressor MalfunctionCAUTION Should the compressor malfunction, be sure to make the switch to a replacementcompressor as quickly as possible.Use only the tools indicated exclusively for R410A. See "11-3. ToolsSpecifically for R410A."11-5-1. Procedure for Replacing Compressor(1) Recovering refrigerantAny remaining refrigerant inside the unit should not bereleased to the atmosphere, but recovered using therefrigerant recovery unit for R410A.Do not reuse the recovered refrigerant, since it will containimpurities.(2) Replacing CompressorSoon after removing seals of both discharge and suctiontubes of the new compressor, replace it quickly.(3) Checking for sealingUse nitrogen gas for the pressurized gas, and never use arefrigerant other than R410A. Also do not use oxygen orany flammable gas.(4) EvacuationUse a solenoid valve-installed vacuum pump so thateven if power is cut off in the middle of evacuation of airdue to a power interruption, the valve will prevent thepump oil from flowing back.The equipment may be damaged if moisture remains inthe tubing, thus carry out the evacuation thoroughly.When using a vacuum pump with exhaust air volume morethan 0.883 cu.ft./min. and ultimate vacuum pressure rateof 50 micron Hg.Standard time for evacuation(1) Recover refrigerantOK(2) Replace compressorOK(3) Check for sealingOK(4) EvacuationOK(5) RechargeLength of tubingEvacuation timeLess than 33 ft. (10 m)More than 10 minutesMore than 33 ft. (10 m)More than 15 minutes65
