Method for controlling a hydrodynamic machine and hydrodynamic machine

A hydrodynamic machine, comprising:

• a bladed primary wheel;
• a bladed secondary wheel, the bladed primary wheel and the bladed secondary wheel together forming a working chamber which is configured for being filled with a working medium in order to transfer a drive power hydrodynamically from the bladed primary wheel to the bladed secondary wheel by way of a working medium circuit in the working chamber;
• a working medium reservoir configured for containing a working medium supply therein to which a control pressure is applied in order to displace one of more and less of the working medium from the working medium supply into the working chamber in order to adjust a predetermined fill level;
• and
• a control device configured for carrying out a method including the steps of:
• detecting, at least indirectly, a pressure increase in the working medium reservoir, when the control pressure is applied to the working medium supply;
• and
• determining, as a function of the pressure increase that has been detected, a fill level of the working medium supply in the working medium reservoir, wherein a pressure is (a) detected at least indirectly in the working medium reservoir at a predetermined time period after a start of an application of one of the control pressure and a changed control pressure and (b) compared with a limit value that is predetermined.