Abstract: A method of controlling a motor of a ventilator of a heat exchanger, the method includes detecting a starting behavior of the motor, detecting a starting obstacle of the motor, setting the starting behavior of the motor in accordance with a predefined scheme of correction, and setting at least one of a torque of the motor is set and a direction of rotation of the motor is set, and the direction of the motor being reversed.

Abstract: A method of controlling a motor of a ventilator of a heat exchanger, the method includes detecting a starting behavior of the motor, detecting a starting obstacle of the motor, setting the starting behavior of the motor in accordance with a predefined scheme of correction, and setting at least one of a torque of the motor is set and a direction of rotation of the motor is set, and the direction of the motor being reversed.

Abstract: The present invention is directed to a switching device and to a pertaining method for parallel connection of subscriber terminal devices having complex performance features. Subscriber terminal devices connected in parallel are thereby driven in an interface driver via a principal subscriber control and at least one subsidiary subscriber control. Due to the realization of a logical and physical interface between the principal and subsidiary subscriber control, the subscriber terminal devices are connected to one another both connection-oriented as well as with respect to their performance features.