[CRITICAL] Air Handler 2 Back Online

[Physics facility information]

Air Handler 2 is back online and normal system parameters are returning.

The root cause of the Air Handler 2 outage was a failed relay in the fire safety panel.

The root cause of the Air Handler 1 outage overnight was a freeze protection circuit being triggered by a combination of the low overnight ambient temperature and the change in inlet air plenum flow dynamics caused by AH-2 shutting down.

Indications are that AH-2 shut down between 12:00 and 1:00 am and that AH-1 shut down shortly thereafter.
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