The compressor is hitting the high pressure switch not bypassing, unless bypassing turns the compressor and fan off. Off at 610 and back on at 400 in under 1min. From cold start up it takes about ten min to get to this point -- then it stays there! Yes I do worry about the longevity of the compressor--do scroll compressors have reed plates? Can they vary the speed of the compressor to change pressures?