The present invention includes a motor (7) the pump (2) having, a method of controlling a pumping device and a control unit (6), a pump (2) is in the operating state, the motor (7) of the when it is driven in one direction, the motor (7), with the corresponding load factor in operation of the pump apparatus, the pump apparatus, the load factor of the motor (7) can be derived therefrom at least one One of further comprising means for monitoring the operating parameters relates to a method. The method includes the steps of determining the actual value of said at least one operating parameter, the force applied from the outside, acts on the motor (7) in a size of up to degree a catastrophic operating conditions for the pump device is started and determining whether the dolphin whether, if a fatal operating conditions is initiated in the pump device, comprising the steps of performing a state transition to the non-actuated state from the operating state of the pump (2), its state transition, the pump device immediately after a fatal operating state is started, comprises a control unit (6) is interrupted suddenly to drive the motor (7) in said first direction, and a step.
.FIELD 1