1, systematically learn the basics of electrician, electronics, transistor circuit, use of multimeter, identification and application of components, refrigeration principle and fault maintenance, and circuit diagram.

2. Familiar with the working principle, fault judgment and fault maintenance of single-door and multi-door refrigerators, freezers, large freezers, air conditioners and small and medium-sized cold storages.

3, refrigerator, freezer, air conditioning (window machine, cabinet machine, hang up) the principle of large air coolers and maintenance ideas and skills.

4. Learn the maintenance, relocation and installation technology of single-door and multi-door refrigerators, freezers, cold storage of air conditioners (window machines, cabinets and hanging machines) and central air conditioners.

5. Proficient in pipeline welding (copper pipe, steel pipe), leak detection, evacuation, fluorination and refrigeration system sealing.

6, central air conditioning, inverter air conditioning, large cold storage, electrical control system, CPU computer control panel, fault identification and maintenance methods.