Here are a few main reasons：
(1)The environment monitoring unit (EMU) is faulty
(2)The communication serial port is damaged or the line is faulty
(3)The EMU is reset manually
And you can replace the EMU,check whether the communication serial port is damaged and whether the line is faulty
to deal with it. You can check in thunder-link.com for more information about Huawei MA5800-X7
Maggie - 2nd February 2018 (02:53 GMT)
My Huawei MA5800 X7 got an active alarm , but can still working normally, why is that? How can I shut down the alarm?