Cause : Capacitor Failed comes when the D.C. bus capacitors have failed. If a capacitor in your drive has failed, it could lead to various issues such as erratic behavior, voltage fluctuations, or even complete failure of the drive.

1. Capacitors in drives are often used for smoothing and filtering purposes, and their failure can have significant consequences.
2. First, you need to identify which capacitor has failed. Capacitors in a drive can be of different types and sizes, serving various functions. The failed capacitor might be visibly swollen, leaking, or damaged. Ensure proper safety precautions before inspecting the drive's internal components.
3. Disconnect power to the drive and ensure that it is completely de-energized before attempting any inspection or repair work. This is crucial for your safety and to prevent further damage to the drive.