Elevator car roof system and a control system for monitoring an opening state of an elevator car roof

An elevator car roof system comprising:

• a plurality of movable roof panels forming an elevator car roof;
• at least one sensor configured to indicate positions of the roof panels and to detect an object on any roof panel, the positions comprising at least a first state in which the roof is fully closed, a second state in which the roof is fully open and a third state in which the roof is partially open;
• and
• a control unit,
• wherein the control unit is configured to enable normal elevator operation based on at least one signal received from the at least one sensor only in the first state when no object is detected on the roof,
• wherein the control unit is configured to, based on at least one signal received from the at least one sensor, disable any elevator operation in the third state or when the object is detected on the roof, and
• wherein the control unit is configured to enable an elevator inspection drive based on at least one signal received from the at least one sensor only in the second state.