Automatic Fault Detection and Diagnostics and Hierarchical Fault Suppression in ASHRAE (RP-1455) (LB-17-009)

This paper describes two of the unique elements of the advanced control sequences developed for ASHRAE Research Project 1455 (RP-1455): automatic fault detection and diagnostics (AFDD) and hierarchical alarm suppression. AFDD is a method used to identify fault conditions and provide possible diagnoses. Hierarchical fault suppression is a method based on hierarchical structure used to reduce the incidence of nuisance alarms. It is written by the members of the research team and is part of the deliverables for this research project. AFDD and hierarchical alarm suppression will further enhance the ability of DDC systems to make intelligent alarm distribution and management decisions.