Fault Codes/Rehlko/MAINPWROVERL SDRehlkoMAINPWROVERL SDUnclassifiedGeneralWhat This Code MeansMain power overload; An over current fault on the 70 controller outputPossible Causes•Short circuit•Over current on controller outputSuggested Actions1Contact an authorized dealer for serviceRelated Rehlko Fault CodesMAINPWROVERL SHUTDOWNMAINPWROVERL SHUTDOWN SDMAINPWROVERLNOT IN AUTO WLWTOVERCRANK SAFETYLOWBATTERYVOLTSOVERFREQUENCYLOW BATTERY VOLTSOVERSPEEDLOCKED ROTOR SDOVERVOLTAGEBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for MAINPWROVERL SD on your specific Rehlko unit — cited to the OEM manual, not a forum guess.TRY IT FREE