A METHOD AND SYSTEM FOR GENERATING MAINTENANCE DATA OF AN ELEVATOR DOOR SYSTEM

The invention relates to a method for generating maintenance data of an elevator door system. The method comprises: detecting a first event during closing or opening of a door of the elevator door system and defining a time stamp of the first event, wherein the first event is opening or closing of a safety circuit; detecting at least one second event during said closing or opening of the door of the elevator door system and defining time stamp of the at least one second event; defining a difference value by comparing the time stamp of the first event and the time stamp of the at least one second event; comparing the difference value to previously stored one or more difference values; and generating maintenance data of the elevator door system. The invention also relates to a system performing at least partly the method.