Hello everybody

I'm having an issue with a Climate Master Heat pump on a new installation. The unit runs in cooling for about 20 mins then the system pumps down with out hitting setpoint, a few times it ran for about 2hrs or more. The system runs fine in heating. Could it be crap in the reversing valve??? I've recovered the gas and evacuated the system down to 250 microns, scaled in fresh R-410a and its still acting the same.

Please help. Climate master is not helping at all!!!