Elevator system and a method

An elevator system comprising:

• an elevator car;
• a hoistway with landing doors;
• a first sensor system generating position information indicating a position of the elevator car in the hoistway, the first sensor system comprising a door zone sensor providing positioning information indicating that the elevator car is located at a landing door;
• a second sensor system generating position information indicating a position of the elevator car in the hoistway, the second sensor system comprising an absolute position measurement device providing positioning information indicating the absolute position of the elevator car in the hoistway;
• and
• a hoisting machine moving the elevator car during elevator runs between the landing doors based on position information generated by the first and second sensor system,
• wherein, in case the elevator system detects that one of the first and second sensor systems has a fault such that information indicating when the elevator is located at a landing door or information indicating the absolute position of the elevator car in the hoistway is missing, and the elevator system can determine which one of the first and second sensor systems has the fault, the elevator system is configured to control the hoisting machine to continue an elevator run to a landing door, if positioning data from the first or second sensor system for which no fault has been detected is available.