DC OVERVOLT

What does 3210 mean?

Excessive intermediate circuit DC voltage, exceeding the trip limit (e.g., 728 V DC for 400 V units). This fault often occurs during rapid deceleration of high inertia loads or due to problems with the braking system, posing a risk of damage to the drive's power components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the brake chopper and associated resistor (if used) are functioning correctly and sized appropriately.

2. 4

   Increase the deceleration time (ramp-down time) parameter to allow for a slower reduction of motor speed, reducing regenerative energy.

3. 5

   Consider implementing the coast-to-stop function if applicable or retrofitting the frequency converter with a brake chopper and resistor.