Air Conditioning Maintenance Procedure:

1. Comprehensive Inspection. When air conditioning units encounter issues, a thorough inspection is required, initially checking parameters such as machine pressure and system operating temperature values; for split-type units, this must be done with both indoor and outdoor units connected; connect a pressure gauge to detect the compressor exhaust pressure, ensuring it's connected when the machine is stationary to avoid high-temperature burns during operation; use your hand to feel the temperature of the compressor exhaust to the condenser section of the pipeline, first use your fingers to quickly test the temperature to prevent injury.

2. Welding Operations. Prior to welding, the refrigerant in the system must be released. Always wear protective eyewear during welding to prevent eye injury; during the refrigerant release, operators should not face the process port or release gas towards others to avoid frostbite from refrigerant. Adhere to welding operation requirements to prevent poor installation or injury to others.

3. Power On Operation. When repairing the outdoor unit of a split system individually, power should not be applied while the high-pressure or low-pressure valves are closed to avoid system bursting due to excessive pressure or explosion accidents caused by the compressor running in a vacuum. When inspecting the outdoor fan system, the unit must be powered on, ensuring that the air conditioner panel and fan grille are properly installed.