Fault Codes/Rehlko/INTERN ERROR SHUTDWNRehlkoINTERN ERROR SHUTDWNUnclassifiedGeneralWhat This Code MeansInternal failureRelated Rehlko Fault CodesL WTLED4I/O MODULE NOT FOUNDLFI/O MODULE COMMUNICATIONS LOSTLO CRANK VLT WHWTLOCKED ROTOR SDHIGH ENGINE TEMPERATURELOW BATTERY VOLTSHIGH BATTERY VOLTAGELOWBATTERYVOLTSBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for INTERN ERROR SHUTDWN on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about INTERN ERROR SHUTDWNGET THE ANSWERFree account required — we'll bring your question with you.