Durst Automatic Timer: how does it work?

I have a DES100 kit and it comes with an automatic timer, I am unsure on how it works. It only has two buttons (focus and expose) and a dial for the time, plus a hidden one wich I believe is for the calibration.
I'm pretty sure I have it wired up correctly but each one of the two buttons does exactly the same thing: the light of the enlarger stays on until you press the button again, so the "timer" aspect of it is pretty much gone

Anyone can help me figure this out?

Hi Nicola,

Have you had any joy figuring this out? I believe I had the same issue when I set up my kit and eventually worked out how to get the timer aspect working.

I can't remember exactly what I did but I'm planning on getting my equipment out tomorrow to test anyway, so if you're still having an issue I'll take a look and gt back to you.