The LEDs on the front panel of the BSC common power distribution box are labeled RUN and ALM.
Table 1 describes the LEDs on the front panel of the BSC common power distribution box.
LED |
Color |
Status |
Meaning |
|---|---|---|---|
RUN |
Green |
On for 1s and off for 1s |
The MDMC is operating and communicating with the GSCU. |
On for 0.25s and off for 0.25s |
The MDMC is not operating or not communicating with the GSCU. |
||
Off |
There is no power supply to the MDMC or the power distribution box is faulty. |
||
ALM |
Red |
Off |
There is no alarm. |
On |
The power distribution box is faulty. The ALM LED, however, is always on during the MDMC self-test. It is an indication that the ALM LED is functional. |
NOTE: When the power distribution box is reset, the RUN and ALM LEDs turn on at the same time. Meanwhile, the monitoring board is performing self-check. As soon as the self-check is complete, the RUN and ALM LEDs turn off. Then, the RUN and ALM LEDs normally display the operating status of the power distribution box.