The Gree CC series magnetic levitation variable frequency centrifugal unit is a permanent magnet synchronous variable frequency centrifugal chiller independently developed by Gree using magnetic levitation bearing technology, with a cooling capacity range of 100RT-1100RT. The application of multiple technologies such as permanent magnet synchronous motor, two-stage air supply, motor direct drive impeller, and four quadrant frequency conversion has improved the energy efficiency of the unit. At the same time, magnetic levitation bearings were used to replace traditional mechanical bearings, achieving oil-free operation of the refrigeration system, avoiding complex lubrication systems, and further improving performance. The reliable industrial grade microcomputer control system, group control technology, and building communication interface ensure excellent operational performance of the unit. This unit can be widely used for air conditioning systems in hotels, clubs, office buildings, and other places, especially suitable for energy-saving renovation projects of large air conditioning systems.