Fault Codes/Generac/506Generac506UnclassifiedGeneralWhat This Code MeansConfiguration MismatchPossible Causes•Voltage configuration set in controller does not match voltage configuration for installed Voltage Configuration Cartridge (VCC).Related Generac Fault Codes10001005505-J410065051048504105350310555021058Browse all Generac fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 506 on your specific Generac unit — cited to the OEM manual, not a forum guess.Your question about 506GET THE ANSWERFree account required — we'll bring your question with you.