Introduction to Troubleshooting

Presentation

This part contains information for troubleshooting problems in a working system. It assumes that the system is correctly installed and that all the commissioning tests have been completed successfully. The troubleshooting operations are described under the following headings:

• Chassis operation

• Unexpected tripping

• Mechanical control operations

• Electrical control operations

Layer Model

When troubleshooting the device, it is useful to consider a layer model. There are three layers:

• Direct connection

• Electrical

• Mechanical

The following diagram shows the layers in the device:

Direct communication

Electrical

Mechanical

If the troubleshooting actions for a layer are not successful, go to the next layer until you reach the Mechanical layer. If you cannot solve the problem after troubleshooting the Mechanical layer, contact your Schneider Electric Services representative.

Maintenance of the Device

Schneider Electric recommends a preventive maintenance program to ensure that devices retain the operating and technical characteristics specified in the catalogs during their service life. Maintenance must be carried out by trained and qualified personnel.

For information about the preventive maintenance program and maintenance procedures, refer to DOCA0305•• MasterPacT MTZ IEC Circuit Breakers with MicroLogic Active Control Unit - Maintenance Guide in Related Documents at the beginning of this guide.