关键词: 混合动力汽车；空调不制冷；故障检测；故障排除

Abstract: The air conditioning system of new energy vehicles is quite different from that of traditional fuel vehicles in terms of refrigerant, compressor working mode and air conditioning system control logic. Taking the no refrigeration of the air conditioning system of a Dongfeng Yueda Kia K5 hybrid electric car as an example, starting from the fault phenomenon, by searching for information such as the composition and working principle of the air conditioning system, adjusting the direction of fault finding with the help of new energy vehicle diagnostic instruments, comprehensively using technical means such as maintenance circuit diagram, reading fault code data flow, etc., analyze the cause of the fault, determine the nature and location of the fault, fundamentally find and solve the problem, and provide ideas and methods for new energy vehicle maintenance.

Key words: Hybrid electric vehicle; No refrigeration of air conditioner; Fault detection; Fault exclude