A rules-based FDD in BMS (e.g. “SAT>set+deadband+full cooling”) targets which category of problem first?

Choices

• (A) Fault/ drift (valve, sensor, setpoint) vs. normal weather-driven load swing
• (B) Masonry rebar splicing in duct
• (C) Always replace VAV with CAV in all
• (D) Blower door only