Fault Codes/Rehlko/RDO--01RehlkoRDO--01UnclassifiedGeneralWhat This Code MeansOverspeedRelated Rehlko Fault CodesRDO--02RDO--04P0300RDO--07P1-10RDO--09OVERVOLTAGE FAULTREGCOMMLOSS SHUTDWNOVERVOLTAGEREVERSE POWER SHUTDOWNOVERSPEEDTIMER ERROR NOTICEBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for RDO--01 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about RDO--01GET THE ANSWERFree account required — we'll bring your question with you.