Beginning at 9:57a I began receiving alarms for a fire pump run and a few minutes later alarms for end and corner station chilled water pumps. Initially, FAC systems looked ok. After combing FMCS remotely following persistent alarms, end station pumps were alarmed out, and chillers were naturally in run inhibit. Because I could not reset remotely, I went to site to investigate. I observed that both VFD's on the EX CWP were not receiving power. The electrical service at EX in the AHU was not tripped, but the power light was not illuminated. I reset both and they stayed on without issue. Revisiting the VFD's confirmed they were back online. These issues were mirrored at EY, and the solution was the same.

Despite the same alarms at the corner, there were no observable issues with the corner chilled water system. Nor were the fire pumps running. Mid stations seem to be insulated from any issues or alarms. As of 12:45p FAC systems have returned to their nominal state.

R. McCarthy T. Guidry