What causes an ATV61/ATV71 drive to display a PRF fault code?

Resolution:

The PRF fault is triggered when the drive’s internal diagnostics detect a loss in its ability to monitor the removal of power from the PWR control terminal.
Recommended checks:

• Verify control power signal. Measure voltage at terminal PWR (to 0 V) and ensure that 24 Vdc is present.
• Check logic input status. Navigate to Menu 1.2 → Logic Input Map and verify that PR status is High.
• Inspect terminal card configuration.  Power down the drive and remove the terminal card (I/O wiring board).
  Verify that Switch 1 (SW1) is in the UP position (Source mode).
• Reset the fault. Cycle power to the drive to clear the fault condition.

Note: This fault is not related to the activation of the safety function.

Additional considerations:

The fault may indicate internal damage to the drive.
If the PRF fault occurs repeatedly, the unit may require repair, including replacement of the control board and/or power board.
In such cases, consider sending the drive for service or replacement.

If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:

Frequently Asked Questions - Schneider Electric (se.com)

If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us atdrive.products.support@se.comto create a case with our Technical Support Team.

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