A refrigerating system according to the invention comprises refrigerating cycle having a compressor (4), a condenser (6), a collecting container (10), an expansion device (16), an evaporator (18) and refrigerating circuits circulating a refrigerant therethrough; a liquefying set comprising an additional condenser (24), connected in parallel to the condenser (6); and a control unit that in operation allows switching between normal operation of the refrigerating cycle and refrigerant collecting operation in which the remaining refrigerant is sucked off the condenser (6), is liquefied by the additional condenser (24) and collects in the collecting container (10).