一辆三菱欧蓝德乘用车,车主反映该车自去年购买以来空调系统就不制冷。起动发动机,接通空调开关,以验证故障现象。发现空调出风口的风向及风量正常,空调压缩机电磁离合器没吸合,空调出风口吹出的是自然风,大约过5 min 后空调指示灯开始闪烁。根据故障现象,初步判断该故障与制冷剂量有关。接上冷媒充注机,检测该系统压力,高、低压侧的压力均为620 kPa,正常,由此看来制冷剂不短缺。从电路图了解到,该车的空 A Mitsubishi Outlander passenger car, the owner reflects the car since the purchase last year, air-conditioning system is not cooling. Start the engine, turn on the air conditioner switch to verify the fault phenomenon. Found that the air conditioning air outlet and the normal air flow, air conditioner compressor electromagnetic clutch did not pull the air conditioning air outlet is the natural wind, about 5 min after the air conditioning indicator light began to flash. According to the fault phenomenon, the initial judgment of the failure and the amount of refrigerant. Connected to the refrigerant filling machine, testing the system pressure, high and low pressure side of the pressure is 620 kPa, normal, it seems the lack of refrigerant. Know from the circuit diagram, the car is empty