In a method of the application, cooling energy is produced by a refrigerating device. The cooling energy produced by the refrigerating device is supplied to at least one cooling station by a cooling circuit, circulating in which is a refrigerant, which upon release of its cooling energy to the at least one cooling station is converted from the liquid to the gaseous state and is then converted back to the liquid state by corresponding pressure- and temperature control in the cooling circuit. Upon transfer of the cooling system to its state of rest, a control value disposed in the cooling circuit is controlled in such a way that a desired operating pressure (ρβ) arises in the cooling circuit downstream of the control valve. Refrigerant cooled by the refrigerating device is received in a reservoir disposed upstream of the control valve in the cooling circuit.