Diagnosis Functions

Contact Wear Diagnosis

The contact wear increases every time the contactor breaks the current in the power circuit.

The contact wear algorithm embedded in the control module calculates the remaining service life of the contacts. When the remaining service life of the contacts is below 15%, it is indicated:

• locally by the Diagnosis LED on the front face of the contactor.

• remotely by the optional remote wear diagnosis module, option available on advanced contactor only.

With this diagnosis indication, predictive maintenance can be planned for replacing the complete set of switching modules and avoiding breakdown maintenance.

For replacement of the switching modules and resetting the contact wear diagnosis, see Switching Module Replacement.