H
Resistor Module Abnormal Discharge (2) (ECM)
Fanuc · Alpha i Series AC Servo Motor and Spindle
What does H mean?
The Capacitor Modules are not discharging due to a malfunction of the discharge circuit. This points to a failure within the Resistor Module's components or control.
Common Causes
- The braking resistor module is experiencing an abnormal discharge condition (second instance).
- Persistent fault in the braking resistor system.
- Contradictory signals from the braking resistor monitoring system.
- Component failure within the braking resistor control or sensing circuitry.
- Improper heat dissipation from the resistor, leading to thermal issues.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Inspect the Resistor Module for internal component failure or signs of overheating.
- 2
Verify the functionality of the discharge circuit's control logic.
- 3
Check resistance values of the Resistor Module components, if accessible.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series AC Servo Motor and Spindle