I have this trane unit 4 compressor 2 stage condenser, head pressure going nutz but suction not moving a lb! Strangest thing ever for me. Then this thing just goes screaming up and trips on high head with everything working normally other than surging of course. Anyone else have luck like mine to get butt kicked for 2 days of searching and testing, to find system is so over charged I could have charged 5 houses! well not exactly but I will find out tomorrow. I'll let you guys know!