a system for diagnosing at least one component requiring maintenance in an appliance and / or installation , having a ) a device , designed for data and / or message interchange with regard to states of one or more components with an analysis unit , b ) a device , designed to receive historic data from the one or more components with regard to their life in collective form , c ) a device , designed for data and / or message interchange with a learning machine unit that is designed to deliver a predictive model for identifying at least one component requiring maintenance to the device , d ) an evaluation device that is designed to use the data and / or messages coming from the analysis unit , e ) a device , designed for data and / or message interchange with a monitoring device that is designed to take the one or more identified components requiring maintenance , which can prompt a visual and / or audible display is provided .