Fault Codes/Generac/502Generac502UnclassifiedGeneralWhat This Code MeansConfiguration MismatchPossible Causes•Voltage configuration set in controller does not match voltage configuration for installed Voltage Configuration Cartridge (VCC).Related Generac Fault Codes503504501505500505-J4000325A50613410001 SECOND FLASH (1 ON – 1 OFF)1005Browse all Generac fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 502 on your specific Generac unit — cited to the OEM manual, not a forum guess.TRY IT FREE