This whitepaper, published by Clockwork Analytics in 2020 and modified in November 2022, describes the importance of FDD in HVAC systems and its potential benefits. The paper defines FDD as a process that uses software algorithms to identify faults and diagnose problems in HVAC systems. The paper discusses the challenges faced by building owners and operators in maintaining HVAC systems, and how FDD can help to address these challenges by detecting and diagnosing faults early, reducing energy consumption and costs, and improving the lifespan of the equipment. The paper also discusses the different types of FDD methods available, including rule-based methods and model-based methods, and the advantages and disadvantages of each. It highlights the importance of data collection and management in the FDD process, as well as the importance of working with qualified and experienced FDD service providers.

Keywords: Artificial Intelligence (AI), Building Retrofits, Cloud & Data Analytics, Control & Monitoring Equipment/Sensors, Data Networking, Energy Efficiency/Management, Intelligent Building, Fault detection, Diagnostic, NEXUS, Analytics