Maintenance password of Zhongshan Carter air compressor: 123456. Zhongshan Carter air compressor is a machine for manufacturing and supplying air, which can convert electric energy into air pressure to meet the needs of various industrial applications. It is an efficient, reliable and economical air compressor, which can meet the needs of various industrial applications. It is characterized by compact structure, small volume, light weight, low noise, convenient maintenance, reliable operation and long service life.