Drive cooling fan
Common heat-related VFD and servo-drive failure point.
Eaton PowerXL VFD Fault Codes
Eaton PowerXL drives, including the DG1, DC1, and related series, use fault codes for incoming power problems, motor overload, overheating, and communication issues.
Common Eaton Faults
| Fault | Meaning | Quick Fix |
|---|---|---|
| OC | Overcurrent | Check motor short, accel too fast, jammed load |
| OV | DC bus overvoltage | Increase decel time, add brake resistor |
| UV | Undervoltage | Check supply sag, loose input wiring |
| OH | Drive overtemperature | Clean heatsink, verify fan airflow |
| OL | Motor overload | Check load and motor current settings |
| GF | Ground fault | Megger motor and cable, check leakage |
| PH | Input phase fault | Check 3-phase input and fuses |
| COMM | Communication loss | Check fieldbus and control wiring |
Need Replacement Parts?
Before ordering, match the drive part to the model number, electrical rating, and failure symptom. Check current prices on Amazon - prices and availability change frequently.
Most Common Real-World Causes
OC — Overcurrent
Usually caused by:
- Motor cable short
- Mechanical jam
- Acceleration time set too short
- Incorrect motor data in parameters
OV — Overvoltage
Common on high-inertia loads that stop too quickly. The regenerated energy raises DC bus voltage.
Fixes:
- Increase decel time
- Add dynamic braking resistor if supported
- Use coast-to-stop where acceptable
OH — Overtemperature
PowerXL drives depend on clean airflow. Clogged panel filters and failed cooling fans are common causes.
Bottom Line
Start with the basics: incoming power, motor condition, load condition, and airflow. Most Eaton faults are protection trips caused by real electrical or mechanical problems, not bad drives.