3120 Mains phase fault in lenze i550 drive

Fault Code 3120 in a Lenze i550 drive indicates a mains phase fault. This means there's an issue with the power supply to the drive, specifically related to the phases of the incoming power.

Potential Causes & Solutions

1. Power Supply Issues:
   • Phase Loss: One or more phases of the power supply may have been lost.
   • Phase Reversal: The phases of the power supply may be connected incorrectly.
   • Voltage Fluctuations: Significant voltage fluctuations can disrupt the drive's operation.
2. Drive Internal Components:
   • A fault within the drive's power supply or control circuitry.
   • Solution: This often requires professional inspection and repair or replacement of the faulty component.