Troubleshooting SiENBE12-620248 Service DiagnosisTroubleshootingCheck No.04Refer to P.253Check No.06Refer to P.255(R5150)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Any thermistordisconnected?YESMalfunctioningNOStop valve closed?NOYESYESNOGas shortage error again?FunctioningCheck No. 06Check the thermistors.YESNOOil oozing at internal piping?NOYESCheck No. 04Electronic expansion valvefunctioning?YESNOOil oozing at relay pipeconnections?Check for gas leakage.Change for a specified amount offresh refrigerant.NOYESCompressor vibratingtoo much?* Discharge pipe thermistor* Indoor / outdoor unit heat exchanger thermistor* Room temperature thermistor* Outdoor air thermistorReconnect in position.Open the stop valve.Repair the pipe flare orreplace the square union.Check the power transistorharness for looseness.Correct it as required. Alsoreplace cracked pipe if any.Check the pipes forimproper contact. Correctas required. Also replacecracked pipe if any.Replace the electronic expanvalve.Replace the room temperatuoutdoor air thermistor, or theindoor unit or outdoor unit heexchanger thermistor.(1) Replace the PCB.(2) Replace the compressor.Procedure complete
