Fault Codes/Rehlko/OVERVOLTAGE FAULTRehlkoOVERVOLTAGE FAULTUnclassifiedGeneralWhat This Code MeansGenerator set shutdownPossible Causes•OvervoltageSuggested Actions1Adjust overvoltage adjustment potentiometer (R41 or R42) counterclockwise until red LED4 lights. Generator set should shutdown on overvoltage fault in approximately 2 seconds.Related Rehlko Fault CodesP1-10P0300OVERVOLTAGEREVERSE POWER SHUTDOWNOVERSPEEDOVERFREQUENCYOVERCRANK SAFETYNOT IN AUTO WMAINPWROVERL SHUTDOWN SDMAINPWROVERL SHUTDOWNMAINPWROVERL SDMAINPWROVERLBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for OVERVOLTAGE FAULT on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about OVERVOLTAGE FAULTGET THE ANSWERFree account required — we'll bring your question with you.