1. The elevator safety maintenance equipment must be sensitive. When the safety maintenance equipment fails, the elevator should not be put into normal operation.
2. Each component and the connecting fasteners between the components should be strong without looseness.
3. The parts of the working and moving parts should be smooth and outstanding, without jamming, and there should be enough oil in the gearbox and smooth equipment. The lubricating oil must meet the requirements of the elevator manufacturer.
4. The covers, covers, parts, fasteners, etc. on the parts and equipment, switches and components should be intact.
