As your warning message says 'due to thermal event',
First thing I'd do is check its clean inside, I know its not an old unit, but depending on where it lives it may be a dust haven, best to make sure your not clogged up already hehe,
secondly, how many fans are in there? might need more fitted
and it may also be an issue that the heatsink on the psu is causing,
give us some feedback, and pictures of the unit if possible please.