1. The overload does not open.
2. The safety device does not open.
3, the object is too large, it is not good to close the door.
4, the object piled up is not secure and not open.
5, the object is too long, extending the safety window and other emergency exits.
6, the floor (hall) door, car door closed is not good.
7. Someone puts the head, hands, feet, out of the car or into the hoistway.
8. The car travels faster than usual or slows down.
9, the elevator is not normal (sound is wrong, there is a strange feeling, there is a local collision, etc.) does not open.
10, there are flammable, explosive, easy to break and other dangerous goods can not be opened.
