Power Unit
Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive
What does F070 mean?
A critical failure has been detected within the drive's power section (e.g., rectifier, DC bus, inverter IGBTs). This indicates a significant internal hardware component failure that severely impacts the drive's ability to convert and deliver power to the motor. This usually requires component replacement or drive replacement.
Complete Troubleshooting Guide
- 1
Check that the maximum ambient temperature around the drive has not been exceeded, as high temperatures significantly stress power components.
- 2
Cycle power to the drive to attempt a diagnostic reset of the power section.
- 3
Inspect for any visual signs of damage within the drive's power section, such as burnt components or bulging capacitors (requires qualified personnel and power off).
- 4
If the fault cannot be cleared after basic troubleshooting, replace the drive as power unit failures are typically not field-repairable.