Flow chart and tech support diagnostics on inverter driver and inverter compressor. Minimum 2 hours pre-authorized electrical diagnostics required 100% confirmation of electrically open circuits on the variable speed drive board. Tech support confirms good windings on the Mitsubishi compressor but open circuits between P2-U, P2-V, P2-W Seth and Brandon will consult with JP regarding the proper route for repairs. The retrofit replacement upgrade kit requires installing a refrigerant cooling circuit for the new design and parts are under warranty however aftermarket parts may be available for a simple control board replacement Sistem is powered down until further repairs are completed