So we bought a house and took possession at the beggining of May...and we love it. The problem is, the sun is already hot and the grass looks pathetic, so its time to turn on the irrigation system we have right? Wrong...I have no clue what I'm doing. I've replaced leaky copper fittings and even helped put in a water heater, but this is completely foreign to me. There are basically 4 major points of attraction in my system (that I know of):

1) The control box with timer, zones..etc. - directions are right on it, and it seems to be in working order
2) The PVC "U" coming out the round with 2 valves on it (1/4 turn lever valves)
3) A round green lid in the ground marked "Irrigation control valve" with 1 turn valve (1/4 turn lever valve with no wires, cellunoids etc) in it
4) A rectangular green lid in the ground marked "Irrigation" with nothing more than exposed PVC coming out of the ground and going back into the ground with no valves and a vertical copper pipe with a flapper on the top which I assume is some sort of bleeder/backwash valve in it

I have turned all lever valves to the "on" posistion parellel to the pipes and tried to manually start from the control box, but while it says "system watering", nothing is happening
Also, there doesn't seem to be any "moving water" sound when I turn any of the valves. I have pictures, but it seems they are too large to upload. Any tips or advice anyone?