Power Supply Fault

What does 4 mean?

This fault indicates that the drive's internal 5V supply has dropped below 4 Vdc for over 100 milliseconds, suggesting an issue with the internal power regulation for control circuits. This can be caused by excessive load on the 5V supply or wiring problems to external devices connected to the REF terminals.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If the problem persists, consult the factory for assistance, as it may indicate a hardware failure within the drive's power supply circuit.