System comprised of a domestic appliance and an external device

The invention relates to a system consisting of a household appliance and an external device, in particular for parameterization, fault diagnosis and remote maintenance of the household appliance, wherein the one device has a transmitting part and the other device has a receiving part, which is for the exchange of electromagnetic radiation in the wavelength range of visible Light or infrared are formed and can be activated by an actuation of an actuating means on the respective device. In order to specify a system consisting of a domestic appliance (4) and an external appliance, in which a recognizable by the human eye identification of an interface for data exchange between the household appliance (4) and the external device on the household appliance (4) can be omitted without worsening the ease of use for the user, the invention proposes that by activating the transmitter part (6) of this continuously a predetermined and stored in a memory of the transmitter part (6), consisting of a plurality of different code words existing,Search code can be emitted and in a processing unit of the receiving part of the receiving part received signals with the stored in a further memory of the receiving part search code are comparable and in accordance with the received signals with the search code by means of the receiving part, a predetermined response signal can be output.