Fault Codes/Discovery Energy, LLC (Rehlko)/EXTERNAL FAULTDiscovery Energy, LLC (Rehlko)EXTERNAL FAULTUnclassifiedGeneralWhat This Code MeansExternal Fault message displayedPossible Causes•External contact assigned to this input is closed•Fault condition in customer-supplied equipment connected to external input•Loose or faulty connectionSuggested Actions1Check connection to external input2Identify and correct the cause of the fault condition3Refer to manuals for connected equipmentRelated Discovery Energy, LLC (Rehlko) Fault CodesFAIL TO ACQUIRE PREFFAIL TO ACQUIRE STBYENGINE STAFAILURE TO ACQUIRE PREFERREDEMERGENCY STOPFAILURE TO ACQUIRE STANDBYE3FILE CONTENTS ARE FOR A DIFFERENT CONTROLLERE0GROUND FAULTD15I/O MODULE LOST COMMBrowse all Discovery Energy, LLC (Rehlko) fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for EXTERNAL FAULT on your specific Discovery Energy, LLC (Rehlko) unit — cited to the OEM manual, not a forum guess.Your question about EXTERNAL FAULTGET THE ANSWERFree account required — we'll bring your question with you.