Hi.
I had a similar problem with my "Intelligent" (well, for me is stupid all the time) Vulcano. It seems the gas evacuation was not being performed too well and the boiler's included gas smell detector/sensor was making the boiler turning off all the time. Well, just a little bit of wind, or 'ultralight' gas smells and the boiler was shut off by the damned ensor. The sollution? I had to remove that too sensitive piece (pls read xit instead, btw), and the problem was solved. Anyway, I added an external gas detector/sensor near the boiler, just in case - prevention before all! ;-), I hope this may help you.
Help3r
August 2008