Drive cooling fan
Common heat-related VFD and servo-drive failure point.
Fuji Frenic-Mini Fault Codes
Fuji Frenic-Mini drives are compact and reliable, but their faults still fall into the usual VFD categories: current, voltage, thermal, and memory issues.
Common Fuji Faults
| Fault | Meaning | Quick Fix |
|---|---|---|
| OC1 | Overcurrent during accel | Increase accel time, check load |
| OC2 | Overcurrent during decel | Increase decel time |
| OC3 | Overcurrent during run | Check motor short or sudden load |
| OU1 | Overvoltage during accel | Check supply and regen |
| OU2 | Overvoltage during decel | Lengthen decel, add braking |
| LU | Undervoltage | Check line sag or loose terminals |
| OH1 | Drive overtemperature | Clean heatsink and fan |
| EF | External trip | Check external fault input |
| Er1 | Memory / keypad fault | Power cycle, inspect control section |
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.
Practical Troubleshooting
- If faults happen only on stop, focus on decel and regenerated energy.
- If faults happen only on startup, focus on accel time and load binding.
- If LU happens randomly, inspect the incoming power first.
Bottom Line
Fuji Frenic faults are usually tied to how aggressively the drive is tuned versus the actual machine load. Start with motor data, accel/decel times, and cooling.