Fault Codes/Eaton/51GEaton51GUnclassifiedGeneralWhat This Code Means51G relay alarmRelated Eaton Fault Codes87GBrowse all Eaton fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for 51G on your specific Eaton unit — cited to the OEM manual, not a forum guess.Your question about 51GGET THE ANSWERFree account required — we'll bring your question with you.