Fault Codes/Rehlko/LED 1RehlkoLED 1UnclassifiedGeneralWhat This Code MeansGenerator shuts down; Fault lamp lights; LED 1 lightsPossible Causes•Engine speed exceeds 70 Hz (2100 rpm) on 50/60 Hz sets (Overspeed)Suggested Actions1Move generator master switch to off/reset before restarting generatorRelated Rehlko Fault CodesLED 4LED4LCLLED5L.O.P.LFL WTLOIPM SYNCHING (IN-PHASE MONITOR SYNCHING)LO CRANK VLT WINTERN ERROR SHUTDWNLOCBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for LED 1 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about LED 1GET THE ANSWERFree account required — we'll bring your question with you.