SiBE28-805 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1833.34 “LC” Outdoor Unit: Malfunction of Transmission BetweenInverter and Control PC BoardRemoteControllerDisplayLCApplicableModelsCMSQ200A7, 250A7Method 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 PC board and outdoor control PC board Defect of outdoor control PC board (transmission section) Defect of inverter PC board Defect of noise filter Faulty fan inverter Incorrect type of fan inverter Faulty compressor Faulty fan motor
