LEDs on the MDMC Panel

There are two LEDs on the MDMC panel: RUN and ALM.

Table 1 describes the LEDs on the MDMC panel.

Table 1 LEDs on the board

LED

Color

Status

Meaning

RUN

Green

On for 1s and off for 1s

The board is working and communicating with the GSCU.

On for 0.25s and off for 0.25s

The board cannot communicate with the GSCU, or the board is not working.

Off

There is no power supply or the power distribution box is faulty.

ALM

Red

Off

There is no alarm.

On

There is an alarm. When the board is starting up, the status indicates that the ALM indicator functions well.


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