Air Conditioner Maintenance Procedure:

1. Comprehensive Inspection. When various air conditioners malfunction, a thorough inspection is required, first checking the machine's pressure and the operating temperature values at various system points; for split systems, this must be done with the indoor and outdoor units connected; connect the pressure gauge to measure the compressor exhaust pressure, ensuring it's connected when the machine is stationary to avoid high-temperature burns during operation; use your hands to feel the temperature of the compressor exhaust port to the condenser section, initially use your fingers to quickly test some temperatures to prevent injury.

2. Welding Operations. Prior to welding, release the Freon from the system. Wear protective eyewear before welding to prevent eye injury; during the Freon release, the operator should not face the process opening or discharge towards others to avoid frostbite from Freon. 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 accidents such as system bursting due to excessive pressure or explosion accidents caused by the compressor running in a vacuum. When inspecting the outdoor fan system, it must be powered on, and it is essential to ensure that the air conditioner panel and fan grill are properly installed.