Finding the Cause of a Masterpact MTZ Trip or Alarm

A trip or alarm event is signaled:

• On the Micrologic X control unit HMI, by the trip cause LEDs or the service LED. When the control unit is powered, a red or orange pop-up message is displayed on the screen.

• By the overcurrent trip switch (SDE).

Depending on the options installed, a trip or alarm can also be signaled:

• By an additional overcurrent trip switch (SDE2).

• By the outputs of the programmable contacts (M2C).

• By the outputs of an IO application module.

• By an email sent through IFE or EIFE Ethernet interface.

• On a remote controller connected to the communication network (application customized by user).

• On the FDM128 display.

Active alarms can also be consulted in the following ways:

• On a smartphone with Masterpact MTZ Mobile App connected to the Micrologic X control unit:

  • Through Bluetooth.

  • Through the USB OTG connection.

• On Ecoreach software connected to the Micrologic X control unit:

  • Through the USB connection.

  • Through the Ethernet interface.

  • Through the IFM Modbus-SL (RTU) interface.

The cause of a trip or an alarm can be identified locally by using one of the following:

• The indicators on the Micrologic X control unit HMI (see Identifying the Cause of a Masterpact MTZ Trip or Alarm Using the Micrologic X Control Unit):

  • The fault trip reset button on the circuit breaker (A).

  • The Micrologic X health status LEDs (Ready and service LEDs) (B).

  • The Micrologic X display screen (C).

  • The trip cause LEDs (D).

• A smartphone with Masterpact MTZ Mobile App installed to get the tripping cause, the trip or alarm context, and the device ID:

  • Through NFC.

  • Through Bluetooth.

  • Through the USB OTG connection.

For more information, refer to the Micrologic X - Control Unit - User Guide (see Related Documents).

The diagnostic data is available when the Micrologic X control unit is powered.

If the Micrologic X control unit is not permanently powered by an external 24 Vdc power source, connect the Micrologic X control unit to an external power supply (such as the Mobile Power Pack as an example) through the mini USB port to have access to the diagnostic data.

When the Micrologic X control unit is powered externally, the availability of diagnostic data depends on the Micrologic X control unit status:

• If the Micrologic X control unit is healthy, all diagnostic data is available.

• If there is an invalid Micrologic X control unit self-test, what diagnostic data is available will vary.

• If the Micrologic X control unit is inoperative, no data is directly available. However, some data can be extracted using the NFC function with the Masterpact MTZ Mobile App.

The trip cause LEDs and the service LED are powered by the Micrologic X control unit internal lithium battery and will remain on for four hours when there is no other power to the control unit. To switch on the trip cause LEDs again after four hours, press the Test/Reset button.

The circuit breaker has tripped automatically, interrupting the power supply, and the fault-trip reset button has popped out.

Status LEDs	Micrologic X Display Screen	Trip Cause LEDs	Probable Cause
Ready LED flashing green. Service LED off.		One of the trip cause LEDs is on red.	Electrical fault on the network (see Resetting the Circuit Breaker after a Trip Due to an Electrical Fault).
Ready LED off. Service LED red.		All LEDs are on.	Invalid Micrologic X control unit self-test (see Resetting the Circuit Breaker after a Trip Due to an Invalid Micrologic X Control Unit Self-Test).

The circuit breaker has not tripped, but the Micrologic X control unit service LED is on.

Status LEDs	Micrologic X Display Screen	Trip Cause LEDs	Probable Cause
Ready LED flashing green. Service LED orange.		All LEDs are off.	Medium severity alarm (see Recommended Action after Detection of a Medium Severity Micrologic X Alarm).
Service LED red. Ready LED flashing green. Service LED red. Ready LED off.		All LEDs are off. All LEDs are on.	High severity alarm (see Recommended Action after Detection of a High Severity Micrologic X Control Unit Alarm).