LED Indicators Introduction
ACPS-2406 PN 51304:B 09/02/2003 11
1.6 LED Indicators
There are 16 LEDs that indicate various conditions and troubles. The following table lists and
describes each.
Table 1.2 LED Indicators
Reference LED Name Color Description
D19 GND FLT Yellow Illuminates when a ground fault is detected on any NAC,
battery lead, or 24-volt output.
D32 NAC 1 Activated Green Illuminates when NAC 1 is activated.
D40 NAC 2 Activated Green Illuminates when NAC 2 is activated.
D47 NAC 3 Activated Green Illuminates when NAC 3 is activated.
D54 NAC 4 Activated Green Illuminates when NAC 4 is activated.
D81 MONITOR Green Blinks steadily during normal polling process. Shuts off
when there is a monitor trouble.
D66 NAC 1 Green Glows steadily when communication is established with the
FACP. Blinks steadily during normal polling process.
D67 NAC 2 Green Glows steadily when communication is established with the
FACP. Blinks steadily during normal polling process.
D68 NAC 3 Green Glows steadily when communication is established with the
FACP. Blinks steadily during normal polling process.
D69 NAC 4 Green Glows steadily when communication is established with the
FACP. Blinks steadily during normal polling process.
D70 TRBL Yellow Illuminates when one of the following troubles occur: brownout;
+38 volt supply supervison; invalid address.
Blinks once, pauses, then blinks again, repeating this pattern for
brownout trouble.
Blinks twice, pauses, then blinks twice again, repeating this
pattern for +38 volt supply failure.
Blinks three times, pauses, then blinks three times again, repeating
this pattern. Panel programming does not match DIP Switch
settings.
D71 BAT/CHG Yellow Illuminates when there is a battery or charger trouble.
D72 UCFAILURE Yellow Illuminates if the microcontroller fails.
D75 AC Green Illuminates when there is AC power.
D73 SLCRXA Green Illuminates when data is transmitted on the SLC.
D74 SLCTXA Green Illuminates when data is received from the SLC.
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