The same thing happened at a lab near me. During lockdown maintenance just decided to turn off the freezer. Maintenance was absolutely not supposed to touch the

The same thing happened at a lab near me. During lockdown maintenance just decided to turn off the freezer. Maintenance was absolutely not supposed to touch the freezer. Presumably some notice was given to someone to go through the building and turn off anything on, and they thought that overrode the standing notice to not switch off the freezer. You can't really prevent this kind of thing other than automated battery backup mobile network connected alerts.