Air Conditioning Maintenance Process:

1. Comprehensive Inspection. When any air conditioning units encounter malfunctions, a thorough check is required, initially verifying parameters such as machine pressure and system operating temperatures at various points; for split systems, this must be done with both indoor and outdoor units connected; connect a pressure gauge to measure the compressor exhaust pressure, ensuring it's done when the machine is stationary to avoid high-temperature burns during operation; feel the temperature of the compressor exhaust port to the condenser section of the pipeline with your hand, first using your fingers to quickly test some temperatures to prevent injury.

2. Welding Operations. Prior to welding, release the refrigerant from the system. Always wear protective goggles to prevent eye injury. During the refrigerant release, operators should not face the process opening or direct the gas towards others to avoid frostbite from the refrigerant. Adhere to welding operation requirements to prevent poor installation or injury to others.

3. Power Operation. When repairing the outdoor unit of a split system separately, do not operate it under power with the high-pressure valve or low-pressure valve closed to avoid overpressure causing system burst accidents or the compressor running at a vacuum leading to an explosion. When inspecting the outdoor fan system, it must be powered on, ensuring the air conditioning panel and fan grille are properly installed.