Possible causes
- Overload.
- Phase loss.
- Poor cooling.
- Clogged fan or cover.
- Worn bearings.
- Voltage or winding issues.
How to perform a proper diagnosis
Measure current and voltage, check temperature, cooling, and the mechanical condition of the load.
Important
Do not assume that every instance of overheating is an electrical fault. A jammed machine or a tight bearing can significantly increase the motor load.
