Hi Andyo,
I think you might be onto something there. If the power cuts out, then it's likely that the cooling will be affected. Our cameras generally startup with the cooling switched off, so if the power drops, it will probably stop the cooling. The software may not realize this has happened and be left in an unexpected state (leading to 'unknown' temperature values). Installing the new software will help highlight this, as the software will now display a warning if the camera disconnects for any reason.
Let me know when you're back up and running. Just so you know, I'll be between the 17th and 24th of May, but will be back on the 25th.
Chris