故障处理 Trouble Shooting

The most important tools for trouble shooting on flex problems are:分析Flex故障需要借助以下资料：

■控制原理图 Control Diagram

报警记录 Alarm-log,indications of actual values

以下电路图Wiring diagrams of WECS-9520(E87, E85,E90, E95,E94,E96, etc.)

如果某一值不稳定时，可以通过flexView内曲线观察。

flexView报警栏内显示报警原因。

With flexView trend lines can be used to find out if a value is unstable. The journal of the flexView shows directly the cause of the alarm.

综合考虑报警原因Combination of Alarms

有时候不单是一个报警，而是一系列报警。这时候比较复杂，但是第一个发出的报警很可能是最初原因。

Some situations create not one but a series of alarms. Since this can be confusing,the first one that came up is probably the root cause.

一需要合理的判断故障具体原因，分析当前的情况。是否有人曾在主机或者辅助系统检修过？启停过某些设备等？

Logical sense may still be required to pinpoint the exact source of trouble.The current situation has to be analyzed. Has somebody done some work on the engine or the auxiliaries ? Switched on or off some equipment?

更换备件 Replacing parts
当不清楚原因时，不要盲目的更换新的备件。可以试着以下操作：
It is NOT recommended just to replace parts with unclear status with new ones (used but probably OK).Try to find out the status by e.g.
与另外一个缸对调下FCM-20模块。exchanging an FCM-20 module with one from an other cylinder
.与另外一个共轨阀对调exchanging a rail valve with one from an other cylinder两缸之间对调部件，很容易发现该部件的好坏。但是先检查该部件是否有附件。Exchanging components with one from an other cylinders makes it very clear if a component is faulty or not.But check first that else is controlled by these components.

传感器故障报警Sensor fail alarms that go on and off
检查传感器电源供应和连接的电缆是否正常。
故障传感器应该尽快更换。
如果不能马上更换传感器，最好断开接线，否则的话可能会影响控制系统的正常工作。
以下传感器可以被断开：The following sensors can be disconnected:
燃油油量传感器fuel quantity sensors
排气阀位置传感器exhaust valve stroke sensors
共轨压力传感器(另外·个应该正常工作)rail pressure transmitters曲轴角度传感器(另外一个应该正常工作)
crank angle sensor (the other one has to be operational !)