UnderVoltage

What does 4 mean?

The DC bus voltage has fallen below the minimum threshold (407V DC for 400/480V input, or 204V DC for 200/240V input). This fault indicates an insufficient incoming AC line voltage or a momentary power interruption. This condition can be enabled or disabled via [Fault Config 1] (page 1-46) based on application needs.

• Input AC voltage to the drive is below the minimum operational threshold.
• Loss of one or more phases in the incoming power supply.
• Incorrect voltage setting for the drive (P0-01).
• Faulty DC bus capacitor or rectifier stage.

Click steps to track your progress.

1. 1

   Monitor the incoming AC line voltage at the drive's input terminals for sags, drops, or power interruptions.

2. 2

   Verify parameter [Fault Config 1] on page 1-46 to ensure the undervoltage fault is configured as desired for the application.