This usually indicates a bad PSU, either the PSU is dying or it gets way too hot because of dust, it could also be a voltage related issue, these PSUs will only function well between 200v and 240v, outside of this range in either direction usually creates problems, so you want to check your voltage as well.

There are few more things that need troubleshooting but the info you provided is not enough, please create a new topic and post the following:

1- Complete Kernel Log
2- Miner Status page

and of course, any more info you have on this, like was the miner working fine for a long period before? is it brand new? any piece of info you can provide will increase the chances of someone here giving you the right answer.