You have ordered a new fan and need to run the machine while waiting for the delivery.
While changing this parameter can clear an immediate alarm, it should be done with caution:
When the control unit's upper fan motor fails or slows down, the CNC triggers . This alarm is a safety mechanism designed to prevent the internal electronics from overheating and suffering permanent damage. Why Use Parameter 8901? fanuc parameter 8901 better
The alarm is active. If the control unit's upper fan fails or overheats, the machine will stop.
If you would like to proceed with deeper troubleshooting, tell me your (e.g., 0i-MC, 0i-TD, 31i), and I can help you confirm the exact replacement fan part numbers or structural diagrams for your system. Share public link You have ordered a new fan and need
Press the key on the key panel. The 701 Fan Alarm should now disappear from your active window. The Hidden Risks of Leaving 8901 Enabled Long-Term
Would you like a specific example for your FANUC model (0i, 31i, or PMi)? Why Use Parameter 8901
Press the softkey on the bottom edge of the screen to reveal the parameter settings page.
Setting this to "1" is a temporary troubleshooting measure and should not be a permanent "fix" to avoid hardware damage from overheating. : Switch the CNC to MDI mode .
Here is the breakdown of :