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故障现象一辆2012款奔驰S400混合动力车,由奔驰M272 V6汽油发动机和128 V三相电动机共同驱动,配备高压电动制冷压缩机,因空调系统不制冷而进厂维修。故障诊断接车后试车验证故障,接通点火开关起动车辆,接通空调开关,空调开关指示灯随即点亮,同时也能明显听到发动机前方散热风扇发出正常运转的声音,但空调出风口一直吹出自然风,将所有控制温度都调至最低,空调系统不制冷。
Symptom A 2012 Mercedes-Benz S400 hybrid, driven by a Mercedes M272 V6 gasoline engine and a 128 V three-phase motor, is equipped with a high-voltage electric refrigeration compressor that enters the factory for maintenance because the air-conditioning system is not refrigerated. Fault diagnosis After the test car to verify the fault, turn on the ignition switch to start the vehicle, turn on the air conditioning switch, air conditioning switch indicator light then lit, but also can clearly hear the radiator engine in front of the normal operation of the fan sound, but the air outlet has been Blow the wind, all the control temperature are adjusted to a minimum, the air conditioning system is not cooling.