P3 Bus Dip

What does 11315 mean?

The DC bus voltage on port 3 has dipped more than 180V below the drive's bus memory when the drive is offline or in stand-alone mode. This indicates an unstable DC bus voltage, which can affect drive reliability.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the drive's bus memory settings and internal voltage references against actual measured bus voltage readings.

2. 4

   Ensure the drive is properly sized for the application's connected load to prevent excessive and frequent bus voltage dips.

3. 5

   Check the health of the DC bus capacitors, as degraded capacitors can lead to poor voltage ripple suppression.