It is important that the inlet quality of the evaporator is less than or equal to 0.3 because if it were higher, the DX exchanger would not use all the latent heat available and therefore there is also the risk that the fluid does not evaporate completely and comes out of the evaporator a little liquid and a little gas and if it enters the compressor in this state, the compressor will break.
It may be that excessive subcooling has to be applied in order to achieve an input title of 0.3 or less.
In such a case we suggest reducing the gap between evaporation and condensation temperature if possible.