3210 DC bus overvoltage fault in lenze i550 drive

Fault Code 3210 in a Lenze i550 drive indicates a DC bus overvoltage fault. This means the voltage on the DC bus within the drive has exceeded its safe operating limit.

Potential Causes

1. Drive Internal Components:
   • A fault in the drive's rectifier, smoothing capacitor, or control circuitry.
   • Solution: This often requires professional inspection and repair or replacement of the faulty component.
2. Power Supply Issues:
   • Excessive AC voltage input to the drive.
   • Solution: Check the power supply for voltage fluctuations or overvoltage conditions.
3. Motor Issues:
   • A short circuit or other fault within the motor can cause excessive back EMF, leading to DC bus overvoltage.
   • Solution: Inspect the motor for any signs of damage or malfunction.
4. Drive Configuration Issues:
   • Incorrectly configured drive parameters, such as excessive regeneration or improper motor data.
   • Solution: Review and adjust drive parameters to match the motor and application requirements.

Troubleshooting Steps

1. Check Power Supply:
   • Ensure the power supply is delivering the correct voltage and is free from fluctuations.
   • Use a multimeter to measure voltage.
2. Inspect Drive Connections:
   • Verify that all connections to the drive are secure and free from damage.
   • Check for any loose or corroded terminals.
3. Use Diagnostic Tools:
   • If possible, use the drive's built-in diagnostic tools to gather more information about the fault.
   • These tools might provide specific error codes or data that can help pinpoint the problem.
4. Consult a Technician:
   • If you're unable to resolve the issue, it's recommended to consult a qualified technician who specializes in drive repair.