3
Over-current of Charge Current (ECM)
Fanuc · αi Series AC Servo Motor and Spindle
What does 3 mean?
An over-current condition has occurred in the charge current path to the Capacitor Modules of the ECM. This suggests an issue with the charging circuit or a fault in the capacitor modules themselves.
Repair Steps
- 1
Inspect the wiring and connections to the Capacitor Modules.
- 2
Verify the operation of the ECM's control module, especially its charging circuit.
- 3
Check the Capacitor Modules for any signs of damage or overheating.
Verified technical data. Last updated: March 2026
Source: Fanuc αi Series AC Servo Motor and Spindle