Fault Codes/Rehlko/VOLTS L1-L2 HIGH SDRehlkoVOLTS L1-L2 HIGH SDUnclassifiedElectricalWhat This Code MeansGenerator voltage high; Output voltage exceeds 120% of the system nominal voltage for more than 2 secondsPossible Causes•Generator voltage highSuggested Actions1Contact an authorized distributor/dealer for serviceRelated Rehlko Fault CodesVOLTS L1-L2 LOW SDVOLTS L1 - L2 LOWVOLTS L1 - L2 HIGHVOLTAGE L1-L2 LOWVOLTAGE L1-L2 HIGHUUUNDERVOLTAGEUNDERSPEEDUNDERFREQUENCYUL 94 HF1Browse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for VOLTS L1-L2 HIGH SD on your specific Rehlko unit — cited to the OEM manual, not a forum guess.TRY IT FREE