Fault Codes/Rehlko/REGCOMMLOSS SHUTDWNRehlkoREGCOMMLOSS SHUTDWNUnclassifiedGeneralWhat This Code MeansVoltage regulator communication lossRelated Rehlko Fault CodesREVERSE POWER SHUTDOWNTIMER ERROR NOTICERDO--09TOTAL POWER HIGH SHUTDWNRDO--07VERIFY DATE TIME SETTINGRDO--04RDO--02RDO--01P0300P1-10OVERVOLTAGE FAULTBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for REGCOMMLOSS SHUTDWN on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about REGCOMMLOSS SHUTDWNGET THE ANSWERFree account required — we'll bring your question with you.