9
Over-heat of Control Module (ECM)
Fanuc · Alpha i Series AC Servo Motor and Spindle
What does 9 mean?
The Control Module of the ECM has detected an abnormal temperature, indicating overheating. This can be caused by poor ventilation, excessive load, or a fault in the module itself.
Common Causes
- The internal temperature of the control module exceeds its safe operating limit.
- Inadequate cooling or ventilation of the control module enclosure.
- Overload condition causing the module to generate excessive heat.
- Fan failure within the control module or enclosure.
- Ambient temperature is too high for the system's design.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify the cooling fan of the Control Module is operating correctly and not obstructed.
- 2
Check the ambient temperature inside the cabinet where the ECM is installed.
- 3
Inspect the heat sink of the Control Module for dust accumulation or blockages.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series AC Servo Motor and Spindle