Troubleshooting by Indication on the Remote Controller Si34-603130 Troubleshooting3. Troubleshooting by Indication on the RemoteController3.1 “A0” Indoor Unit: Error of External Protection DeviceRemoteControllerDisplayA0ApplicableModelsAll indoor unit modelsMethod ofMalfunctionDetectionMalfunctionDecisionConditionsSupposedCauses Actuation of external protection device Improper field set Defect of indoor unit PC boardTroubleshooting(V2776)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.Indoor unit PC board replacement.Actuation of external protectiondevice.Change the second code No. to"01" or "02" .Externalprotection device isconnected to terminals T1and T2 of the indoorunit terminalblock.ON/OFFinput fromoutside (mode No. 12,first code No. 1) has beenset to external protectiondevice input (secondcode No. 03)by remotecontroller.YESNONOYES
