What can cause an ATV630 or ATV930 drive to have a blank display and not power up?

1. Verify main power supply

• Confirm that line voltage is present at terminals L1, L2, and L3.
• Ensure the incoming power supply is correct and stable.

2. Check DC bus voltage

• Measure voltage across PA+ and PC- terminals.
• If no voltage is present, the drive may not be receiving or converting input power correctly.

3. Inspect internal power supplies

• Verify the presence of:
  • +24 VDC
  • +10 VDC
• Missing control voltages may indicate an internal power issue.

4. Perform a power cycle

• Turn the drive off and back on.
• Check if the display initializes after restarting.

5. Check communication ports

• Ensure there is no Ethernet cable connected to the Modbus port, as improper connections can interfere with startup in some cases.

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.

If you are not located in North America, please contact your local Customer Care Center for assistance:

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