NITROX 600W Problem

[psybaba]

Hey folks,

I just got a Nitrox Psu and had a technician install it.
After 15-20 mnts of gaming the unit starts making a very loud noise like something intercepts the fan rotation.
Should I lower the fan speed from the bios setting?
Or should I open the unit myself (better not)

Also there is a 3 position lever at the external part of the unit. Positions are named L H A. I checked the manual and the site but didnt figure out what they do.
Site is http://www.inter-tech.de/Deutsch/index-e.html

Thanks in advance

[mpilchfamily]

Chances are the switch is fan speed. If it is the fan speed lowering it isn't going to stop the noise if something is up against the fan. Use a flash light and see if you can see anything touching the fan. I wouldn't open the unit since its brand new. If the problem persists then it may be best to exchange it for a new one.

[psybaba]

I'm heading home to try it right now,
Thanks mate