Just had a unit that a month and a half ago was low on charge. I charged it and with in 3 week it froze up again. Found leak but did not have tools to repair. Went back to make repairs on discharge side and to save time I shut the valves off at condenser and recovered gas. I normally just leave them alone but didn't this time. Placed a wet rag of valve and made the repair, but system under vacuum and opened valves. Now pressures are not normal. High suction and low head (64 suction, 165 head, R22). My question is could I have done something to the discharge valve while soldiering to make these pressures like this? I have worked on units like this at work and on the side and have never had this to happen. I'm just beside myself on this one.