I installed a new 13 seer Trane 2.5 ton split heat-pump. All new components air handler, ref. lines, outdoor unit and t-stat. I was called back and checked pressures suction first started jumping from 20 to 60 psi. then it pulled down to a vaccum. Head pressure maintained 175 psi. Inside temp was 83 and 89 outside. I was told the compressor was faulty and swapped it out. But now having the same problem.