hi get a call that unit is leaking ; airwell spilt kx45 i think, indoor unit froze up defrosted and got unit running on cooling 15psi suction and 120 head, placed on cooling suction shot up to 455psi and heat blasting out, unit running on 407c. while working at this unit noticed the unit beside me was runing funny also 55psi on cooling but when put onto heating head went off the scale over 500psi! any ideas ive tried lots please help asap