SiEBE18-526 Troubleshooting for Outdoor UnitTroubleshooting 3097.16 Inverter Compressor AbnormalRemoteControllerDisplayL5ApplicableModelsAII outdoor unit modelsMethod ofMalfunctionDetectionMalfunction is detected from current flowing in the power transistor.MalfunctionDecisionConditionsWhen an excessive current flows in the power transistor.(Instantaneous overcurrent also causes activation.)SupposedCauses Defect of compressor coil (disconnected, defective insulation) Compressor start-up malfunction (mechanical lock) Defect of inverter PCBTroubleshootingHigher voltage than actual is displayed when the inverter output voltage is checked by tester.(V2812)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Compressor inspectionInverteroutputvoltage checkInverter outputvoltage is not balanced.(Normal if within ±5V Mustbe measured whenfrequencyis stable.Replace the compressor.Compressor inspectionInspect according to the diagnosisprocedure for odd noises, vibrationand operating status of thecompressor.NOReplace the inverter unit.YESYESCorrect power supply.YESThe compressor'scoil is disconnected or theinsulation isdefective.NONODisconnect the connectionbetween the compressor andinverter. Make the powertransistor check mode settingON by service mode.There isinstantenious powerdrop.
