0614IB1701

Resetting the Circuit Breaker after a Trip Due to an Invalid Micrologic X Control Unit Self-Test

Masterpact MTZ Circuit Breaker Reset Sequence

The following table shows the sequence of actions to take after a trip. Further explanation of each action is given in the following paragraphs.

Step

Description

1

Identify the tripping cause.

2

Acknowledge the trip message on the Micrologic X trip unit display screen.

3

Consult the list of possible trip causes and perform the actions recommended to restart after the trip.

4

Reset the circuit breaker (see Resetting Masterpact MTZ Devices).

5

When the circuit breaker is ready-to-close, reclose it (see Closing the Masterpact MTZ2/MTZ3 Mechanism)

Micrologic X Display Screen Trip Message Acknowledgement

Step

Action

1

Press OK.

The screen displays:

  • A description of the trip cause.

  • The date and time that the trip cause occurred.

2

Consult the list of possible detected trip causes in the following table and perform the actions recommended.

3

Press OK to acknowledge the trip and return to the Home menu.

4

Press the Test/Reset button for 3 seconds to reset the control unit and switch off the trip cause and service LEDs.

Recommended Actions After a Trip Due to Invalid Micrologic X Control Unit Self Test

Code

Trip Message

Description

Recommended Action

0x1400

0x1404

0x1405

0x1406

0x1416

CU self-test major malfunction

The control unit self-test detected a major malfunction in the control unit operation.

NOTE: The control unit may or may not trip the circuit breaker, depending on how the fallback position is configured.

Call Schneider Electric field service to replace the control unit.

0x1402

Internal current sensor disconnected

The control unit self-test detected the disconnection of an internal sensor of the circuit breaker.

Call Schneider Electric field service to replace the control unit.

0x1403

ENCT disconnected

The control unit self-test detected the disconnection of the external neutral current sensor of the circuit breaker.

Reconnect the external neutral current sensor (ENCT).

0x6407

Self diagnostic trip

The control unit tripped the circuit breaker for an unknown reason.

Call Schneider Electric field service to replace the control unit.

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