The tools required for replacing a compressor include: a tube bender, a tube cutter, pliers, welding equipment, vacuum and charging tools, auxiliary materials (such as BCUP3 made in Japan), and flux, etc. Source: Beijing Kelon Air Conditioning Repair http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3954188. During maintenance, when the power is connected, if the compressor does not run and emits a "buzzing" sound, focus on checking whether the compressor is stuck or seized. If after starting, the compressor has no response, first check whether the power voltage of the compressor is normal, then focus on checking whether the insulation resistance of the stator winding and the DC resistance of the winding are normal. When serious damage to the compressor is found, it must be replaced. Kelon air conditioning, summary of compressor maintenance experience. However, simply replacing the compressor usually cannot completely eliminate the fault. Because when the compressor is damaged, it often leads to the damage of other related parts. If the refrigerating oil appears dark black and burnt, the refrigerating oil must be replaced, and the refrigeration system should be cleaned. At the same time, the compressor, accumulator, Beijing Kelon air conditioning after-sales service hotline, capillary tube, and fins should be replaced. When replacing the compressor and related parts, the remaining refrigerant should be slowly released first. If the release speed is too fast, it is easy to release the lubricating oil inside the compressor together. When disassembling and welding the inlet and outlet pipes, be sure to prevent the soldering iron from burning the soundproofing material. After replacing the new compressor, the inlet and outlet pipes should be reshaped and brazed strictly according to the operating procedures to ensure the quality of brazing. Compressor: Unlike refrigerators and freezers, most air conditioners use high suction pressure fully enclosed compressors. According to their internal structure, they can be divided into three types: reciprocating, rotary, and scroll compressors. Reciprocating compressors are mostly used in early produced air conditioners and can be divided into single-cylinder, double-cylinder, and triple-cylinder structures; Rotary compressors are divided into rolling piston and sliding vane types, and their cooling methods can be divided into suction type, auxiliary cooling type, and liquid injection cooling type. Scroll compressors use the rotation of the scroll rotor on the scroll stator to change the position and volume of the closed space to compress the refrigerant. The compressor is the core component of the air conditioner, with a precise structure and low failure rate. However, due to improper use or normal aging of the compressor, common failures such as burned compression motors, stuck compressors, and seized shafts occur.