Troubleshooting for Outdoor Unit SiEBE18-526310 Troubleshooting7.17 Inverter Current AbnormalRemoteControllerDisplayL8ApplicableModelsAII outdoor unit modelsMethod ofMalfunctionDetectionMalfunction is detected by current flowing in the power transistor.MalfunctionDecisionConditionsWhen overload in the compressor is detected.SupposedCauses Compressor overload Compressor coil disconnected Defect of inverter PCBTroubleshooting(Q0437)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Output current checkInverteroutputvoltage checkInverter output voltageis not balanced(Normal if within ±5V). Mustbe measured whenfrequencyis stable.Compressor overloadInspection of the compressor andrefrigerant system is required.Compressor inspectionInspect according to the diagnosisprocedure for odd noises, vibrationand operating status of thecompressor.NOReplace the inverter PCB.YESNOReset and restart.NOThe secondarycurrent of the inverter ishigher than 24.9Afor each phase.Replace the compressor.NOYESCompressorinspection Thecompressor's coil isdisconnected.YESYESDisconnect the the connectionbetween the compressor andinverter. Make the powertransistor check mode settingON by service mode.After turningon again, "L8" blinksagain.
