MUNCHKIN Boiler Problems?

I have the above Boiler installed, and it is only 3 1/2 years old. I was trying to switch on the room thermostats to day and noted the heating system was not working. Cheked the boiler pressure, and it was zero(showing CE). I pushed the pressure reducing fill valve(green one) several times. Suddenly, a water flow came out from the outlet pipe, and it continued dripping,at the rate of 1 gallon per hour. I switch off the boiler thinking it was a problem, and after some time put it on again. Then pressure started rising exceeding 150.
I got upset and switched off the boiler again. Water dripping still continues.Can some body help me to solve this problem.