SiBE34-802 Troubleshooting by Indication on the Remote ControllerTroubleshooting 1973.46 “U8” Malfunction of Transmission between Main and SubRemote ControllersRemoteControllerDisplayU8ApplicableModelsAII indoor unit modelsMethod ofMalfunctionDetectionIn case of controlling with 2-remote controller, check the system using microcomputer if signaltransmission between indoor unit and remote controller (main and sub) is normal.MalfunctionDecisionConditionsNormal transmission does not continue for specified period.SupposedCauses Malfunction of transmission between main and sub remote controller Connection between sub remote controllers Defect of remote controller PC boardTroubleshootingCautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.(V2825)SS1of both remote controllers isset to "SUB."Set SS1 to "MAIN"; thepower supply off once andthen back on.Set one remote controller to"MAIN"; the power supplyoff once and then back on.Turn the power off and thenback on. If a malfunctionoccurs, replace the remotecontroller PC board.YESYESYESNONONOUsing 2-remotecontrollers control.SS1of remote controller PC boardsis set to "MAIN."
