I just installed a rheem 3 ton 410a heat pump. The system worked for 2 weeks until friday i got a call that it wasn't running. Suction pressure was reading 60 psi and discharge was 240psi with out side ambient 70 degrees fahrenheit. I added refrigerant and check for a leak with soap bubbles, but couldn't find one. when i switched the unit to heating mode it tripped out on high head pressure almost instantly. I recoverd the refrigerant and found that the system was overcharged due to me adding some, replaced the filterdrier pressure tested with nitrogen, evacuated overnight and then weighed in my charge. the system comes factory charged at 9lbs, i wieghed in 8 lbs and then continued to try to chage the system with super heat/subcool. there wasnt any change in the system in cooling mode. in heating i am not tripping out on high head, probably because i have the proper charge in now. My current conditions in cooling are, 240 psi discharge, 50psi suction, my evap starts to freeze at the txv, suction line temp is 72.6 degrees at the service valve, dicharge temp at service valve is 76 degrees,low compressor amps. I also notice that the equalization tube on the outdoor txv freezes during cooling. in heating mode my pressures are both high discharge is 460 and suction is 140. does this sound like atxv problem?