Emptied air reservoir to examine regulator and internal parts. It's now back together but the edmu needs to reset to 0 air because it has no air in it. Downloaded and printed manual. I can follow the flow chart fairly well and I can get to tools area and view several screens. Done the wait, hold, etc. but I cannot get to the screen, the very last one in the pictorial flow chart, that would allow a reset to 0 pressure. Any help on finding the reset screen would be appreciated. Thanks jim