Why in the refrigerator Stinol does not cool the upper chamber

Refrigerator Stinol, freezers are cooled, but the upper part is not, the compressor is working. Before this, the wife thawed the upper part, because it was frozen.
Mykola
Specialist's answer
In chambers with separate chambers, the freezer is usually a priority unit, and cold air is supplied according to the residual principle. Perhaps the reason for the incorrect setting of the position of the regulator. Check the regulator settings in the freezer and chiller unit.