P2 Bus Dip

What does 11215 mean?

The DC bus voltage on port 2 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.

Complete Troubleshooting Guide

1. 1

   Monitor the incoming AC power quality for sags, voltage fluctuations, or momentary interruptions that could cause DC bus dips.

2. 2

   Inspect all connections to the DC bus and rectifier section for looseness, corrosion, or signs of overheating.

3. 3

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

4. 4

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

5. 5

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