DC Link Voltage Ripple Exceeds Maximum

What does DC link error mean?

This fault occurs when the DC link voltage ripple within the variable speed drive exceeds its maximum permissible level. This often indicates an issue with the incoming mains supply, the rectifier stage, or an unbalance in the input phases. Unaddressed, it can lead to unstable operation, premature component wear, and potential damage to the VSD's internal circuitry.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If voltage dips are observed or caused by other machinery on the same line, try connecting the VSD to alternative mains supply lines if available.