So, if you're seeing EPPOR FAN LOST in the T17 kernel log, it means your miner's cooling fan isn't detected.
Here’s a quick troubleshooting guide:
1. First, check the fan cable for any loose connections or damage. It’s a good idea to unplug and re-plug it or swap out a broken fan data cable.
2. If the fan itself is faulty, replacing it is the way to go.
3. Don't forget to update your control board firmware to the latest version.
4. If the control board is the issue, you might need to replace it.
That’s what zeusbtc suggests for dealing with this kernel log problem. Anyone got other troubleshooting tips to share?
T17 ERROR: FAN NOT DETECTED
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the fan can be tested with a long four pin fan extension.
open the controller and pull the bad fan plug out of the controller.
plug it into the four pin extension.
plug the extension into a 12 volt power source. see if the fan moves.
if the fan moves unplug from the power source.
if the fan does not move it is dead.
lets say it moved
take the bad fan which is in the four pin extension cord and swap with one of the working fans in the controller.
if the problem moves to the good fan jack the fan has a bad cable which may not be repaired
if the problem stays then the jack has a bad sensor
a fast way to test a missing fan readout is always have a good one.
open the controller plug the good fan in place of the non detectable one.
if the good fan shows up the bad fan is bad
if the good fan does not show up the jack is bad.
In addition, the fan has 4 wires red, black, yellow, and blue
Red = Voltage inputs 12v
Black = Ground
Yellow = Speed Signal
Blue = PWM
If the Blue wire is not connected or has a connection problem then the fan will run at full speed but if the yellow wire is cut or no connection from the fan to the control board the controller will detect that there is no fan connected.
So if the yellow wire is disconnected even if you connect the fan to the control board then the error will come up like "error fan lost".
You can fix it by replacing the yellow wire or resoldering the yellow wire on the fan if nothing works then use a multimeter if the yellow wire or the terminal still has a connection or signal.