LEDs on the GTNU Panel

There are three LEDs on the GTNU panel: RUN, ALM, and ACT.

Table 1 describes the LEDs on the GTNU panel.

**Table 1** LEDs on the board
LED	Color	Status	Meaning
RUN	Green	On for 1s and off for 1s	The board is working.
		On for 0.125s and off for 0.125s	The board is loading data.
		On	There is power input but the board is faulty.
		Off	There is no power input or the board is faulty.
ALM	Red	Off	There is no alarm.
ALM	Red	On or blinking	There is an alarm.
ACT	Green	On	The board works in active mode.
ACT	Green	Off	The board works in standby mode.