Fault Codes/Rehlko/AIRDAMPERRehlkoAIRDAMPERUnclassifiedAir IntakeWhat This Code MeansEngine air damper is closed; Airdamper lamp is litPossible Causes•Emergency stop•Overspeed fault•Overvoltage faultSuggested Actions1Manually reset the air damperRelated Rehlko Fault CodesSL0-5301SL0-5311ALOPALT PROTECT SHTDWNAHETATS COM ERRORAGS-10ATS COMERRORAFATS FAULTADVANCED DIAGNOSTIC ACTIVEATS PHASEROTBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for AIRDAMPER on your specific Rehlko unit — cited to the OEM manual, not a forum guess.TRY IT FREE