Air Conditioner Maintenance Procedure:

1. Comprehensive Inspection. In case of failures across various air conditioning units, a full check is required. First, inspect the machine's pressure and system operating temperature values; for split-type units, this must be done with the indoor and outdoor units connected; connect the pressure gauge to detect the compressor exhaust pressure. Please connect the pressure gauge when the machine is stationary to avoid high-temperature burns during operation; feel the temperature from the compressor exhaust outlet to the condenser section pipeline with your hands. Use your fingers to quickly test some temperatures to prevent injury.

2. Welding Operations. Prior to welding, the refrigerant in the system must be released. When welding, protective goggles must be worn to prevent eye injury; during the refrigerant release process, operators should not face the process opening or discharge towards others to avoid frostbite from the refrigerant. Adhere to relevant welding operation requirements during welding to prevent poor installation or injury to others.

3. Power Operation. When repairing the outdoor unit of a split system individually, power operation is prohibited when the high-pressure or low-pressure valves are closed to avoid accidents such as system bursting due to excessive pressure or explosions caused by the compressor running in a vacuum. When inspecting the outdoor fan system, power operation is required, and it must be ensured that the air conditioner panel and fan grill are properly installed.