IARP ABX400pv can't reset desperately in need of help!

[spiloides]

I accidentally pressed the red upside down exclamation mark button. There was a click and the fan went off. The display said PA. What have I done? And how can I get it back to normal. I have no user manual. Please help before their stuff in it spoils.

[install monkey]

press pa again?

[nike123]

Mushroom like one? Picture of switch can help in fast solution. Try to turn it 90°, or something.

http://www.bing.com/images/search?q=emergency+switch