Diagnosing Alarms

Diagnosis Sequence

The following table shows the sequence of actions to take after an alarm is detected by the MicroLogic Active control unit. Further explanation of each action is given in the following paragraphs.

Step	Action
1	Identify the alarm detected.
2	Consult the list of alarm messages in the following tables and perform the actions recommended.
3	Press OK to acknowledge the alarm.
4	Press the button for 3 seconds to reset the latched events, switch off the trip cause LEDs and revert the status bar to green.

Identifying the Alarm Detected

The MicroLogic Active control unit indicates alarms with:

The Ready LED (flashing green or off)
The Status bar (red or orange)
The L trip cause LEDs (red or orange)
A pop-up alarm screen (red or orange)

Two levels of alarm are detected and indicated by the color of the status bar:

Red for high-severity detected alarms.
Orange for medium-severity detected alarms.

Description	Display screen	Status and Trip cause LED description
High severity alarm	Alarm message is displayed on a red screen.	Ready LED: green flashing Status bar: red on ERMS LED: off All trip cause LEDs off
Overload alarm: phase current > 105% Ir	Alarm message is displayed on a red screen.	Ready LED: green flashing Status bar: red on ERMS LED: off L trip cause LED: on
Medium severity alarm	Alarm message is displayed on an orange screen.	Ready LED: green flashing Status bar: orange on ERMS LED: off All trip cause LEDs off
Overload pre-alarm: 90% Ir < Current < 105% Ir	Alarm message is displayed on an orange screen.	Ready LED: green flashing Status bar: orange on ERMS LED: off L trip cause LED: red on

Recommended Action After Detection of High Severity Alarms

The following table indicates what action to perform according to the alarm message.

For more information about event messages, refer to DOCA0265•• MasterPacT MTZ - MicroLogic Active Control Unit - User Guide.

Code	Alarm message	Alarm description	Recommended action
0x1400	Self-test 1. Replace control unit.	The control unit self test detected a major internal event in the control unit operation.	Replace the MicroLogic Active control unit. Contact Schneider Electric support.
0x1402	Current sensor loss. Replace circuit breaker.	The control unit self test detected the disconnection of an internal sensor of the circuit breaker.	Replace the circuit breaker. Contact Schneider Electric support.
0x1403	ENCT disconnected	The control unit self-test detected the disconnection of the external neutral current sensor of the circuit breaker.	Check internal/external wiring of External Neutral Current Sensor (ENCT)
0x1404	Control unit over temperature	The temperature of the control unit is above the maximum temperature threshold.	@experts: different text to event census Decrease ambient temperature near the circuit breaker. If the problem persists, replace the MicroLogic Active control unit.
0x1405	Self-test 3. Replace control unit.	The control unit self test detected a major internal event in the control unit operation.	Replace the MicroLogic Active control unit. Contact Schneider Electric support.
0x1406	Self-test 4. Replace control unit.	The control unit self test detected a major internal event in the control unit operation.	Replace the MicroLogic Active control unit. Contact Schneider Electric support.
0x1409	Unable to read sensor plug	The control unit is unable to read the value of the sensor plug.	@experts: different text to event census Check connection of the sensor plug and performer plugs. If the connection is good but the event recurs, replace the sensor plug or the MicroLogic Active control unit.
0x1413	Ig test - no trip	The ground Ig did not trip.	@experts: different text to event census Restart the test. If the event recurs, contact your Schneider Electric Services representative.
0x1416	Mitop disconnected. Call Schneider Electric support	The circuit breaker Mitop is disconnected.	Contact Schneider Electric support before restarting
0x1430	Protection settings reset to factory values.	If the control unit is switched off due to an internal event, protection settings are reset to default protection settings at the next reboot.	Update the MicroLogic Active control unit firmware with EcoStruxure Power Commission software. Otherwise, plan to replace the MicroLogic Active control unit.
0x1442	Contact wear > 100%. Replace circuit breaker	The contact wear indicator reached the threshold of 100%.	@experts: different text to event census Replace the circuit breaker.
0x150F	Iron CT loss. Replace circuit breaker.	The control unit self test detected an event in all internal current power supply sensors of the circuit breaker.	Replace the circuit breaker.
0x1518	Self-test 6. Replace control unit.	The control unit self test detected a major internal event in the control unit operation.	Replace the MicroLogic Active control unit. Contact Schneider Electric support.
0x6200	Ir start (I > 105% Ir)	The long time protection prealarm started: at least one of the phase or neutral currents is above the 105% Ir threshold. The circuit breaker is operating close to Ir threshold.	@experts: different text to event census Check the load.

For more information about the maximum number of operations for individual parts, refer to DOCA0305•• MasterPacT MTZ IEC Circuit Breakers with MicroLogic Active Control Unit - Maintenance Guide.

Contact your Schneider Electric Services representative for more information about who can carry out the recommended actions.

Recommended Action After Medium Severity Alarms

The following table indicates what action to perform according to the alarm message.

For more information about event messages, refer to DOCA0265•• MasterPacT MTZ - MicroLogic Active Control Unit - User Guide.

Code	Alarm message	Alarm description	Recommended action
0x03F5	Ir pre-alarm (I > 90% Ir)	The long time protection prealarm started: at least one of the phase or neutral currents is above the 90% Ir threshold. The circuit breaker is operating close to Ir threshold.	Check the load.
0x0D09	Firmware discrepancy within control unit	The control unit self-test detected a discrepancy between the firmware versions of control unit processors.	Check the firmware version of the MicroLogic Active control unit with EcoStruxure Power Commission software. If not latest, update the firmware of the MicroLogic Active control unit.
0x0D0A	Invalid CU factory config. 1	Invalid control unit factory configuration.	Plan to replace the MicroLogic Active control unit.
0x140F	Protection settings not accessible 1.	The control unit cannot access the protection settings.	Plan to replace the MicroLogic Active control unit.
0x142F	Last protection settings have not been applied.	The control unit did not apply the last modification.	Apply again the protection settings.
0x1440	Contact wear > 60%. Check contacts.	The contact wear indicator reached or is above the threshold of 60%.	@experts: different text to event census Inspect visually the arc chute and main contacts at the next scheduled maintenance.
0x1441	Contact wear > 95%. Plan circuit breaker replacement.	The contact wear indicator reached or is above the threshold of 95%.	@experts: different text to event census Plan to replace the circuit breaker.
0x1473	Internal access loss. Reboot control unit	Internal access. Reset control unit	@experts: different text to event census Internal access loss. Reboot control unit by simultaneously pressing the 5 buttons , OK, Back, Up, Down.
0x1474	Protection settings not accessible 2.	The control unit cannot access the protection settings.	@experts: different text to event census Reboot control unit by simultaneously pressing the 5 buttons , OK, Back, Up, Down.
0x1482	Sched. Manufact. maintenance within 3 months	A manufacturer maintenance program should be performed within three months.	Plan to schedule the manufacturer preventive maintenance program within three months. To plan, edit report and track maintenance intervention, you may use EcoStruxure Facility Expert app.