Listen for unusual acoustic signatures or excessive vibration coming from the controller cooling fans.
Always isolate and lock out the main switch breaker before opening the controller cabinet doors for internal servicing. fanuc robot series r 30ib controller maintenance manual
Verify that the main robot connection cables (RP1, RM1) are securely connected and free from tension. 3. Periodical Maintenance Schedule fanuc robot series r 30ib controller maintenance manual