Fault Codes/Generac/UNDERVOLTAGEGeneracUNDERVOLTAGEUnclassifiedElectricalWhat This Code MeansUnit will not start in AUTO with utility lossSuggested Actions1Check LEDs/Screen for alarms2Contact servicing dealerRelated Generac Fault CodesUNDER VOLTAGERED (FAULT) LEDOVERVOLTAGELOW FUEL (20%)LOW FUEL (10%)LOW BATTERY WARNINGLOW BATTERY ALARMLOW BATTERYINSPECT BATTERY ALARMINSPECT BATTERYFIRMWARE ERROR-9CHARGER WARNING WARNINGBrowse all Generac fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for UNDERVOLTAGE on your specific Generac unit — cited to the OEM manual, not a forum guess.Your question about UNDERVOLTAGEGET THE ANSWERFree account required — we'll bring your question with you.