What Causes a CrF1 Precharge Fault on ATV61 and ATV71 Drives?

Resolution:

A CrF1 fault indicates a problem in the drive's precharge circuit. Common causes include:

• A fault in the load relay control circuit
• A damaged or failed charging resistor
• An internal component failure within the drive

Follow the next steps to troubleshoot:

1. Verify the incoming line voltage is within the specified operating range.
2. Power cycle the drive and attempt to restart it.
3. Review the drive's fault history and operating conditions leading up to the fault.
4. If the fault clears, continue monitoring the drive for normal operation.
5. If the CrF1 fault persists, the drive likely has an internal hardware issue that requires further evaluation.

In most cases, persistent CrF1 faults require repair or replacement of the VFD.

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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