ACS580 trips Fault 3210 during deceleration, what to check?
My ACS580 drive is tripping Fault 3210 (DC link overvoltage) whenever the motor decelerates, especially with heavier loads. What should I check first to troubleshoot this?
Fault 3210 indicates that the drive's intermediate-circuit (DC link) voltage has risen too high, causing the drive to trip. This commonly occurs when the motor regenerates energy during deceleration or with an overhauling load. It can also be triggered by an excessively high supply voltage.
Likely causes and checks
1Overvoltage control switched off
- Points to it
- The drive's overvoltage control feature, which automatically decreases generating torque and increases deceleration times to prevent overvoltage, may be disabled.
- Check
- Verify that parameter 30.30 Overvoltage control is enabled. Note that it should be disabled if a brake chopper and resistor or a regenerative supply is installed.
2Deceleration time is too fast
- Points to it
- Rapid deceleration, especially with high-inertia loads, can cause the motor to regenerate energy quickly, leading to a DC link overvoltage.
- Check
- Review and adjust the deceleration time. Consider using the coast-to-stop function if the application allows for it.
3Brake chopper or resistor not working or wrongly sized
- Points to it
- If a brake chopper and resistor are installed to dissipate regenerated energy, a malfunction or incorrect sizing can lead to overvoltage trips.
- Check
- Inspect the brake chopper and resistor. Confirm that the resistor is correctly dimensioned and its resistance falls within the allowed range for the drive.
4Supply voltage too high
- Points to it
- An input supply voltage that is consistently too high, or experiences static or transient overvoltages, can directly cause the DC link voltage to exceed its limit.
- Check
- Measure the supply voltage to ensure it matches the drive's nominal input voltage. Look for any static or transient overvoltage conditions on the supply line.
Next check: First, check parameter 30.30 Overvoltage control to ensure it is enabled, unless a brake chopper and resistor or regenerative supply is fitted. If the fault persists, review the deceleration time settings.
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