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Fan 2 is failing

Posted: Fri Aug 21, 2015 1:26 pm
by LRL
It's strange I've been running 1.2.2 for quite a while and haven't had any switches complaining about fans, but over the last week I've gotten several alerts from one switch.
In the log I see "switch[743]: Fan 2 is failing"

Fan2 seems to be in line with fan1 speed wise most of the time, but it doesn't seem to rev as high. Can someone tell me what the parameters are that trigger the fan failing alerts?

Re: Fan 2 is failing

Posted: Fri Aug 21, 2015 2:17 pm
by Eric Stern
If the fan is turned on and the fan speed stays below 1500 rpm for 3 seconds it is considered to be failing. The code will never run the fan that slow, so if it is going that slow something must be wrong with it.

Re: Fan 2 is failing

Posted: Fri Aug 21, 2015 2:35 pm
by sirhc
But please upgrade to newest firmware and see if the fan failure persists.

Re: Fan 2 is failing

Posted: Tue Sep 01, 2015 7:06 pm
by LRL
I haven't seen a warning since the upgrade. I think I'll let it run and see if anything else comes up.

Re: Fan 2 is failing

Posted: Fri Oct 02, 2015 12:47 pm
by keefe007
I have this on a switch running 1.3.2. The failing fan RPM shows 1600 or so.