ESIE09-08 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1853.46 “LC ” Outdoor Unit: Malfunction of Transmission betweenInverter and Control PC BoardRemote ControlDisplayLCApplicableModelsER*Q 011~016*Method ofMalfunctionDetectionCheck the communication state between inverter PC board and control PC board by micro-computer.MalfunctionDecisionConditionsWhen the correct communication is not conducted in certain period.SupposedCauses Malfunction of connection between the inverter microcomputer and outdoor controlmicrocomputer Defect of outdoor unit PC board (A1P) or inverter PC board (A2P). External factor (Noise etc.)TroubleshootingCautionBe sure to turn off power switch before connecting or disconnecting connector,otherwise parts may be damaged.Are theconnectors of theinverter PC board and thecontrol PC board securelyconnected?Replace the inverter PC board (A2P)or the control PC board (A1P).Connect a connecting wire, andthen restart operation.NOAre thereany broken wires inthe connectors of theinverter PC board andthe control PCboard?Repair the broken wires, and thenrestart operation.YESYESNO
