Air Conditioning Maintenance Procedure:

1. Comprehensive Inspection. When various air conditioners encounter malfunctions, a full inspection is required. Initially, check the machine's pressure and the operating temperatures at various system points. For split systems, this must be done with both indoor and outdoor units connected. Connect the pressure gauge to measure the compressor exhaust pressure, ensuring it's done when the machine is stationary to avoid burns from high temperatures during operation. Use your hand to feel the temperature of the compressor exhaust to the condenser section, 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 goggles to prevent eye injury. During the release of the refrigerant, 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 during welding.

3. Power Operation. When repairing the outdoor unit of a split system separately, 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 explosion due to 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.