I searched for it as well.. I found the manual, but alas it is my paper copy and I have not a scanner handy... You want the Tecma Silence, revision 02.04.04
They have "improved" the product though and the manual they have on line no longer applies.. The only choice I see is to E-mail them for the original manual. I am going to try one more "Trick" hold on... Dang, that did not work either.
E-mail them or I can scan mine in a month or so when I next get to my scanner. Problem with that is it's a xerographic copy of a master now,, (Will not scan well) I would download the 2 button manual and ask questions.. The major differences I see are as follows
One, The one button should have water in it all the time
Two, no "Economy flush" button
Three, the water level, should it need adjustment, is done by a dial that is on the BACKSIDE of the controller panel Clockwise increases the fill time.
That should, just about, cover the differences.
OH, no mention of a "Diagnostic LED" on the older manual, it's on or it's off, that's all.
Home is where I park it!