What does AHU-X03 mean?
The fan is drawing more (or less) power than the affinity laws predict for its current speed.
Why does it matter?
Higher-than-curve power means belt slip, bearing failure, impeller fouling, or excessive duct restriction. Lower-than-curve usually means a sensor calibration issue.
What should you do?
Inspect belt tension and bearings. Look for restricted return-air paths or filters at end-of-life. Verify fan VFD calibration.
How Energy Agent prices a finding
Written by Pelorus Engineering · Brent Waluzak, P.E. (FL), President, Pelorus EngineeringLast updated