it runs when your freezer or indoor units activate, if they switched off when you had a cold snap then its probably because your room didn't needing cooling past ambient

Ok. So they do stop if right conditions are made? Also in previous versions I think the vents were spinning at two different speeds, slow and fast. I liked that.

the speed of the fan blades is based on the power setting

So, I'm having an issue where everything worked fine before the 1.1 update, I rolled back the update because most mods aren't updated for it, and now the outdoor units for my main building seem to turn on for no good reason. Looking at it and guessing, it seems like they might be ignoring that all the indoor units are set to 24 degrees (c) and are coming on when the radiators push the temp up to 21/22, though I'm not even sure that's a satisfactory answer.

I have these cranked to -22 and I have food rotting. These seem to be broken.

https://i.imgur.com/IozzahK.jpg

Nevermind I'm an idiot. Didn't notice the power levels.