This message indicates that the mainboard fan speed is abnormal. As a result, the mainboard may overheat, which affects the normal running of the device.
Check the cable connection: Ensure that the cable terminal of the fan is securely connected and reinsert it to check whether the fan works properly.
Check installation: Make sure that the fan is not locked by screws during installation, repair any possible faults.
Replace the fan: If the fan is damaged, replace the fan to restore the normal function.
Check the fan cable terminals to ensure that they are not loose.
Ensure that the fan is not locked by the installation screws. Adjust the fan if necessary.
If the fan does not work properly, replace the fan.
Restart the printer and check whether the fan works properly.