page 17 579-1150 Rev M
4010ES IDNAC Fire Alarm System Installation Guide
3.3.1 ESS LEDs
The ESS card is equipped with LEDs that help the user diagnose the card and system troubles.
Table 11: ESS LED identification and definition
LED number Identification Status
LED1 IDNet negative earth On = IDNet negative terminal is connected to earth.*
LED2 IDNet positive earth On = IDNet positive terminal is connected to earth.*
LED3 IDNet trouble
Steady = No devices are detected.
Blink = Short circuit trouble.
LED4 IDNet 4100 communications On = Communication loss.
LED5 IDNet loop A On = Class A/Open trouble.
LED6 IDNet loop B On = Class B/Open trouble.
LED7 IDNAC 1 fault On = There is a fault on IDNAC SLC 1 circuit.
LED8 IDNAC 2 fault On = There is a fault on IDNAC SLC 2 circuit.
LED9 AC power On = ESS is connected to the main AC power.
LED10 Communication loss On = Communication with the FACU is lost.
LED11 E
LED12 D
LED13 C
LED14 B
LED15 A
These 5 LEDs are used to signal various trouble conditions on the ESS and
its SLC.
See Table 12 for the LED system codes.
*The IDNet circuit on the ESS is electrically isolated and has its own earth fault detection circuit. The IDNet earth fault detection circuit
detects a 10KOhms (or less) stray impedance to earth ground.
The ESS system trouble LED codes are indicated by LEDs A to E.
Table 12: System trouble LED codes
A B C D E Description:
OFF OFF OFF OFF OFF No Trouble: There are no troubles detected on the system.
ON OFF OFF OFF OFF AC Fail: The AC power is disconnected but the battery is working.
OFF ON OFF OFF OFF Low Battery: The battery charge is under 22V.
ON ON OFF OFF OFF
Battery Cutout: The battery charge is below 20V. At this point if jumper P19 is set
to “battery disconnect when depleted” the system will shut down.
OFF OFF ON OFF OFF
Depleted/Missing Battery: If jumper P19 is not set to “battery disconnect
when depleted” this trouble will appear when the battery charge is below 20V.
This code will also appear if the system cannot detect the battery.
ON OFF ON OFF OFF Charger Trouble: There is a trouble with the battery charger.
OFF ON ON OFF OFF
Card Overcurrent: The ESS module or another system card is drawing too much
current.
ON ON ON OFF OFF Negative Earth: The circuit is shorted to ground on the negative wire.
OFF OFF OFF ON OFF Positive Earth: The circuit is shorted to ground on the positive wire.
ON ON OFF ON OFF
City Circuit 1 Trouble: The trouble configured on the City Card’s circuit one has
been triggered.
OFF OFF ON ON OFF
City Circuit 2 Trouble: The trouble configured on the City Card’s circuit two has
been triggered.
ON OFF ON ON OFF
AuxNAC Open: Depending on the chosen configuration, either the Aux circuit or
the NAC circuit is open.
OFF ON ON ON OFF
AuxNAC Short: Depending on the chosen configuration, either the Aux circuit or
the NAC circuit is experiencing a short circuit.
ON ON ON ON OFF
AuxNAC Overcurrent: Depending on the chosen configuration, either the Aux
circuit or the NAC circuit is drawing too much current.
OFF OFF OFF OFF ON Unassigned.
ON ON ON ON ON Unassigned.
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