SiEBE18-526 Troubleshooting for Outdoor UnitTroubleshooting 3117.18 Inverter Start up ErrorRemoteControllerDisplayL9ApplicableModelsAII outdoor unit modelsMethod ofMalfunctionDetectionMalfunction is detected from current flowing in the power transistor.MalfunctionDecisionConditionsWhen overload in the compressor is detected during startupSupposedCauses Defect of compressor Pressure differential start Defect of inverter PCBTroubleshootingCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Inverteroutputvoltage checkInverter output voltageis not balanced.(Normal if within ±5V) Mustbe measured whenfrequencyis stable.Unsatisfactory pressureequalizationCheck refrigerant system.Compressor inspectionInspect according to the diagnosisprocedure for odd noises, vibrationand operating status of thecompressor.YESReplace the inverter PCBNONOReset and restart.NOThe differencebetween high and lowpressure when startingis above0.2MPa.YESYESDisconnect the connectionbetween the compressor andinverter. Make the powertransistor check mode ON byservice mode.After turningon again, "L9" blinksagain.(Q0438)
