Unit started out with correct running pressures between 112 and 120 After 3 min of running it began pumping itself down to 915 microns, after 10-15min the compressor started chugging and hoping and shut itself down and released pressures back into line set, faulty control or electronic metering device. Needs replair Possible contaminant in line set that is being stuck in orifice cause unit to shut down Unit also requires a new evaporator fan Replaced condenser and evap unit, charged system, system is operational, see phots.