1故障现象开机后，机器自检通过，温度、浓度正常。仪器工作一段时间，透析压报警灯闪亮，压力表显示正常，没有触发报警及分路动作。2故障分析根据压力控制原理判断，故障原因主要有以下几点：门）控制电路故障（主要是1、2、3号板有问题）；门）执行机构有问题（主要是负压泵 1 Failure phenomenon After the machine is turned on, the machine passes the self-test, and the temperature and concentration are normal. When the instrument is working for a period of time, the dialysis pressure warning light flashes, the pressure gauge shows normal, and no alarm or shunt action is triggered. 2 Failure Analysis According to the principle of pressure control, the main causes of the failure are the following: Door) Control circuit failure (mainly problems with the No.1, No.2 and No.3 boards); Door) The actuator has problems (mainly negative pressure pump)