Fault Codes/Rehlko/ACRehlkoACUnclassifiedGeneralWhat This Code MeansGenerator output AC sensing is lost; Generator set shuts downPossible Causes•Generator output AC sensing is lostSuggested Actions1Contact an authorized distributor/dealer for serviceRelated Rehlko Fault CodesAC SENS LOSS SHUTDWNAC SENS LOSS WARNINGA-227600ACCY PWROVER WARNING516667 31AD516666 1AHET516663 31AL.N516663 0AL.UBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for AC on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about ACGET THE ANSWERFree account required — we'll bring your question with you.