Fault Codes/Rehlko/OVERVOLTAGEL3--L1RehlkoOVERVOLTAGEL3--L1UnclassifiedElectricalWhat This Code MeansOVERVOLTAGEL3--L1Possible Causes•Source voltage across L3 and L1 is above the overvoltage dropout settingRelated Rehlko Fault CodesREACTIVE POWER LOWREAL POWER HIGHOVERVOLTAGEL2--L3REAL POWER LOWOVERVOLTAGEL1--L2REPLACE CLOCK BATTERYOVERTEMP FAULTRY CRLO WARNING WOUSLVUFBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for OVERVOLTAGEL3--L1 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about OVERVOLTAGEL3--L1GET THE ANSWERFree account required — we'll bring your question with you.