Fault light on CRS-317-1G-16S+

RouterOS General
1

Hi,

My brand new CRS-317 has the fault light on very often (not all the time). I see no related messages in the Log. How can I find out what the fault light means?

Thanks in advance.

2

Try to update your device to the latest RouterOS Testing version (6.44beta54).
If after update fault LED still turns on, execute this command: “/system health detect-fans”

3

Fault light indicates that the fan is not spinning

4

I don’t believe this is true. My CRS317 has the fault light on but it reports:
[admin@MikroTikCRS317] > /system health print
temperature: 36C
cpu-temperature: 35C
psu1-state: ok
psu2-state: ok
fan1-speed: 6690RPM
fan2-speed: 6810RPM
fan3-speed: 0RPM
[admin@MikroTikCRS317] >
The funny part is of course that the output reports a fan3-speed: to the best of my knowledge the CRs317 has only 2 fans, so where does the report of the fan3 come from?

Oh, and b.t.w: the gui shows only 2 fans, both running

5

Apparently not there: https://www.youtube.com/watch?v=KNDZZ5bD-wM

6

Thanks for all the replies

/system health reports:
temperature: 50C
cpu-temperature: 35C
psu1-state: ok
psu2-state: ok
fan1-speed: 6765RPM
fan2-speed: 6705RPM
fan3-speed: 0RPM

Maybe the 50C is a bit high. Don’t know where that comes from, could be a bad temperature sensor.

7

this is a bug. latest Beta release fixes this.

Upgrade and then run command , “/system health detect-fans”.

8

I am sorry to re-open this thread, but I am unable to get rid of the fault light if the fans are not spinning.

I have 1 CRS317 switch which turns on a fault led when the fans stop spinning.

I am running Version 7.1.1 with the V7.1.1 firmware.
I tried downgrading, and then upgrading again with no luck..

If I get the unit to heat up and start the fans, then the light turns off…

I’m guessing the fault is incorrectly link to 0RPM which is normal for a CRS317?

*note: this only happens on 1 of my 10+ units.

9

Update a device to the latest RouterOS version, after update run command “/system health detect-fans”. If the issue persists, send supout.rif file to support@mikrotik.com

10

Hi,

/system health settings detect-fans

7.8 = No change
7.9 = 1 worked, 1 didnt

11

Hi, I have the same problem with my CRS354 on RouterOS 7.9, furthermore the command “/system health detect-fans” is unknown.
Exact shell output:
[admin@crs354] > /system health detect-fans
bad command name detect-fans (line 1 column 16)

12

You will need to use this command

/system health settings detect-fans
13

Thanks, worked for me on CRS317-1G-16S+
ROS 7.16.1