Method for performing automatic maintenance process on at least one functional unit of base unit

The invention relates to a method for carrying out an automatic maintenance process on a functional unit (2) of a base unit (1), wherein the following steps are carried out: detecting a fault state (S1) of the functional unit (2) by means of a detection unit (5); determining (S2) a type of the at least one functional unit (2) by means of the evaluation unit (7); the functional unit (2) is associated with a fault situation-type-level (9) characterizing a specific type of the functional unit (2), the fault situation-type-level (9) being associated with at least two fault states (11) which are prioritized in order of priority (S3), each fault state (11) being associated with a maintenance cycle (S4); selecting (S8) a first fault state (F1) of the at least two fault states (11) having the highest priority; executing a maintenance cycle (S8) associated with the selected first fault state (F1) at the functional unit (2); after the execution of the maintenance cycle of the first fault state (F1) has ended, a current