I have a Turmoil oil chiller m/n 00-300-ro-ATC in a stamping plant. I recently inherited this problem over there. THis chiller is self contained on a rack. The problem I ran across is that I went for a no cooling call. I found the low side pressure (R-22) at 0psi and the high side @ 175 psi @ 87deg ambient. I initially thought leak but learned that one of technicans recently perfromed a leak check two weeks ago. I tried to dump a little gas into the system and the pressures never changed. I then pointed my attention to the liquid line solenoid. I tried to bypass it because it didn't seem to be opening even though I had 110v to it. My question is this sytems has only about 7 ft of pipe between evap (heat exchanger) and the condenser, does this sytstem even require a ll solenoid? Any help would be appreciated. If any more info is needed, please ask.