1. After the elevator maintenance personnel arrive at the scene, they should ask the elevator management personnel and the elevator driver about the operation and failure of the elevator, and make a record.

2. When maintenance personnel carry out maintenance and overhaul of the elevator, they should first put up “elevator maintenance and overhaul” signs in front of the halls on each floor.

3. When maintenance personnel inspect or refuel the elevator engine room, they should first cut off the main power supply of the elevator's incoming line, and only check and refuel when there is no power.