Using Parameter 8901 to clear an alarm does not resolve the physical cooling failure. Operating a FANUC control system without adequate heat dissipation will permanently degrade memory modules and processors. Implement these critical defensive measures while waiting for replacement components:
Disclaimer: Modifying parameters should be done by qualified personnel to avoid damaging the machine. fanuc parameter 8901 better
The bits are assigned as follows:
: If you must run the machine with the 701 alarm bypassed, open the main electrical enclosure doors and position an external shop fan to blow clean air directly onto the control unit. Note: Ensure your workplace environment is free of heavy airborne conductive dust or oil mist before doing this. Using Parameter 8901 to clear an alarm does
When the fan at the back of the CNC cabinet or the servo amplifier stops functioning (usually due to dirt buildup or motor failure), the controller detects this and displays: OH0701 (on newer systems) How it works: The bits are assigned as follows: : If
is considered "better" only in emergency situations where a machine must finish a critical part before maintenance can be performed. Situations to Use This Workaround: