I was called out on a job where the breaker for the heat pump was tripping. I diagnosed a grounded out compressor. Got replacement compressor under warranty(Rheem 10 SEER 3 ton was installed in March). Installed new compressor. Did nitrogen test, evac, and dropped about 6lbs. of virgin R-22. Started unit. Pressures were 175/45 at about 80 degrees outdoor and 82 degree indoor wet bulb. Was adding charge at about 10 minutes into operation when the compressor quit. I got the compressor going again with a hard start but now pressures are staying equalized; no cycle. I've been lucky in the 3 years since I've been out on my own, and this is the first compressor problem I've had on equipment I've installed. The problems seem to have started right around the time they would have started to run the AC. Any ideas are greatly appreciated.