DC Bus Voltage Limit

What does 3211 mean?

The drive is actively limiting torque due to the intermediate circuit DC voltage being either too high or too low. This is an informative alarm indicating the drive is attempting to protect itself from potentially damaging voltage conditions, which can lead to unstable operation or component stress if the underlying cause isn't addressed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Review the drive's braking resistor functionality and settings (if high DC bus voltage is suspected during deceleration).

2. 4

   Check for any sudden load changes or regeneration events that might be impacting the DC bus voltage.