7 Troubleshooting
Table 15: System board trouble LEDs
Indication on diagnosis LEDSr.
No.
Trouble list Description Indication on front
panel
LED 1 LED 2 LED 3 LED 4 LED 5
1 NAC open The NAC line wiring is open, or the end of
line resistor is not connected.
OFF OFF OFF OFF ON
2 NAC short The NAC positive and negative line has
shorted.
OFF OFF OFF ON OFF
3 NAC Overcurrent Overcurrent condition is detected on the
NAC circuit (only when in alarm).
OFF OFF OFF ON ON
4 NAC Disable The NAC is disabled from the DIP switches.
SYSTEM TROUBLE LED
flashing
OFF OFF ON OFF OFF
5 Low Battery The battery voltage is less than 22 V. OFF OFF ON OFF ON
6 Battery Depleted The battery voltage is less than 19 V. OFF OFF ON ON OFF
7 Low Battery Cutout When the Low Battery Cutout option is
enabled from the DIP switches, Depleted
Battery trouble is set and system is battery
operated, then this trouble shall be set.
OFF OFF ON ON ON
8 Charger Trouble Voltage is less than 24 V and charger is off. OFF ON OFF OFF OFF
9 AUX Power Trouble The battery voltage is less than 18 V.
Both SYSTEM TROUBLE
and BATTERY TROUBLE
LED flashing
OFF ON OFF OFF ON
10 DACT Phone Line 1
Trouble
The control unit is unable to communicate
by the DACT line 1.
OFF ON OFF ON OFF
11 DACT Phone Line 2
Trouble
The control unit is unable to communicate
by the DACT line 2.
OFF ON OFF ON ON
12 Central Station
Communication Trouble
2008 detects Central Station
Communication Trouble when it is unable
to communicate to the central station for
15 minutes.
OFF ON ON OFF OFF
13 DACT Disable The DACT is disabled from the DIP switches. OFF ON ON OFF ON
14 City 1 Trouble The city line 1 is disconnected; or there is a
mismatch in the system option and physical
status.
OFF ON ON ON OFF
15 City 2 Trouble The city line 2 is disconnected; or there is a
mismatch in the system option and physical
status.
OFF ON ON ON ON
16 AV Tally Exceeded Alarm verification fails 10 times.
SYSTEM TROUBLE LED
flashing
ON OFF OFF OFF OFF
17 Event Queue Overflow The communication is lost with the LCD
annunciator and the number of events
exceed the maximum number of events in
the queue (255), or the events occur so fast
the queue is overflowed before processing.
ON OFF OFF OFF ON
18 Walk Test Active WALK TEST is enabled. ON OFF OFF ON OFF
19 Card 4 Fail Communication is lost on card 4 for more
than 10 seconds; or if card 4 is configured
but not connected to the control unit.
ON OFF OFF ON ON
20 Card 5 Fail Communication is lost on card 5 for more
than 10 seconds; or if card 5 is configured
but not connected to the control unit.
ON OFF ON OFF OFF
21 Extra Card The annunciator connected to the control
unit but not configured yet.
ON OFF ON OFF ON
22 Time and date not set Time and date is not configured. ON OFF ON ON OFF
23 Positive Ground Fault Positive ground fault is present on the
control unit.
ON OFF ON ON ON
24 Negative Ground Fault Negative ground fault is present on the
control unit.
ON ON OFF OFF OFF
25 Configuration TRBL Control unit configuration is set from spare
DIP switches.
ON ON OFF OFF ON
26 EEPROM WRITE FAIL EEPROM write fail.
SYSTEM TROUBLE LED
flashing
ON ON OFF ON OFF
page 21 579-1403 Rev A
2004 Foundation Series Fire Alarm Control Unit Operation Guide
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