Drive cooling fan
Common heat-related VFD and servo-drive failure point.
Parker AC30 Fault Codes
Parker AC30 drives are used in OEM machinery and process equipment. Their faults often involve current, DC bus, feedback, safe torque off, and thermal conditions.
Common AC30 Faults
| Fault | Meaning | Quick Fix |
|---|---|---|
| Overcurrent | Output current exceeded safe limit | Check motor, cable, load jam |
| Overvoltage | DC bus too high | Increase decel time, add braking |
| Undervoltage | Input supply too low | Check incoming power |
| Heatsink Temp | Drive overheated | Clean cooling path, check fan |
| Motor Overload | Motor model/current wrong or load too high | Verify parameters |
| STO Active | Safe torque off chain open | Check safety circuit |
| Feedback Fault | Encoder/resolver missing or bad | Check feedback cable/device |
| External Trip | Digital input commanded fault | Trace interlock source |
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.
STO Faults
Parker AC30 drives often trip because the safe torque off circuit is open. This is not always a bad drive. Check:
- Safety relay state
- Guard door inputs
- Emergency stop circuit
- STO terminal wiring
Bottom Line
On Parker AC30s, separate the fault into one of four buckets fast: power, motor/load, safety chain, or feedback. That narrows the problem much faster than staring at the keypad.