Does anyone have any experience with the La Marzocco mask Gicar control box? Mine works fine on single and double shots, but if I push the 2 singles or 2 doubles buttons, the solenoid clicks on for about half a second and then clicks off. This is the same for both groups. It is as though they have both been programmed for too short a pour time. This may be the case, because I'm not sure how to go to program mode. The mask control box has an external key for programming mode. I don't have the key, so I have tried putting a jumper on to the box. There is no inidication that I am in programming mode; I have tried turning on with the jumper on, and turning on and then inserting the jumper. I have only tried with the power switch in position 2. (boilers on) With the jumper on, I then tried holding down the swirl button. (far right) This did light up all the buttons for a short period, but even then when I press and hold down the 2 singles button, it still clicks the solenoid on for half a second and then shuts it off.

My thoughts on the problem so far are I don't think it's the flow meters because they are working fine for single and double shots. Because both groups are doing exactly the same thing, I don't think it's the cables, because it would be pretty unlikely that both would fail in exactly the same way. At this point I think programming is still the most likely culprit.

So my questions are:

1. Can anyone confirm the proper sequence for programming mode?
2. Has anyone had a similar problem with some of the pour options not working?
3. Does anyone have a circuit diagram of the mask Gicar control box?

Any help would be appreciated.

Hi Dan, thanks for that; it worked like a charm; all buttons working fine now.