ESIE09-08 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1773.38 “L4” Outdoor Unit: Malfunction of Inverter Radiating FinTemperature RiseRemote ControlDisplayL4ApplicableModelsER*Q 011~016*Method ofMalfunctionDetectionFin temperature is detected by the thermistor of the radiation fin.MalfunctionDecisionConditionsWhen the temperature of the inverter radiation fin increases above 83°C.SupposedCauses Actuation of fin thermal (Actuates above 83°C) Defect of inverter PC board (A2P) Defect of fin thermistorTroubleshootingCautionBe sure to turn off power switch before connecting or disconnecting connector,otherwise parts may be damaged.Faulty heat radiation of power unit Air suction opening blocked Dirty radiator fin High outdoor temperature Check heat conductive pasteNOYESThe radiatorfin temperature issupposed to have risento 84 C or more.Properly connect.YESNOIs theconnector X111A ofthe fin thermistor properlyconnected to the outdoorPC board?Continue operation.Replace the inverter PC board assy(A2P)YESDoes themalfunction code "L4"recur when the unit startsoperation?NOTurn ON the power supply, and thenpress the remote control checkbutton once.
