故障现象 开机后呼吸机处于（LOW RESSU－RE）低压报警可听到机器呼呼的排气声接病人的管道无气体输出。进一步检查是机器背后有一个排气孔（ALARM OUTLET DO NOT OCCLUDE）这个排气孔在O2和AIR压力正常时它自动关闭任何气体压力低或是无压力时它都自动打开排气报警。 Symptom After the power is turned on, the ventilator is at the (LOW RESSU-RE) low pressure alarm. The machine can hear the exhaust sound of the machine humming and connect to the patient’s pipe without gas output. A further check is that there is an air vent behind the machine (ALARM OUTLET DO NOT OCCLUDE). This vent automatically shuts off when O2 and AIR pressures are normal. When any gas pressure is low or there is no pressure, it automatically opens the exhaust alarm.