Manual No. 4801- 2997 Rev 1-15
Secondary Sensing System
24 of 42
The exception occurs if the S
3
determines that conditions warrant tunnel ventilation. Therefore, it assumes
that opening the
Vent
inlets would be detrimental to the current ventilation setup. In this case, it will open
the
Tunnel
inlet upon any Back-Up stage being turned on due to temperature.
It is important to note. If the Back-Up stage
Cool1
is ever timed on due to detection of a minimum
ventilation error, then it will always override the
Vent
inlets only.
8. Trouble-Shooting Your Alarm
8.1
Low Battery
If the battery in the
S
3
drains down to approximately 10.6 volts, the Low Battery alarm condition will be
active. This is very common if the alarm has sounded for some time. If the Low Battery alarm is active, the
Alarm should be set so that no alarm condition exists and the battery should be allowed to recharge. This
may require the operator to disconnect the siren to allow the battery to build back up. If recharging doesn’t
fix the problem, then the battery must be replaced. Contact your nearest Cumberland dealer for a
replacement.
8.2
Power Out
The Power Out alarm can occur in two cases. One is when the power has been out for more than one minute.
The other situation could be caused by the 120VAC 3 amp fuse blown. If the Power-Out alarm condition is
active and you find that there is power present at the outlet where the alarm is plugged in, then you should
check the fuses.
8.3
No Siren at Test
If the siren fails to sound when the test button is pressed, several conditions could exist. The siren itself
could be bad. Check for 12VDC at the siren leads. And, of course, there could be a bad connection
somewhere in the siren circuit.
8.4
Replacing the Fuses
The
S
3
includes two fuses located on the circuit board; One AC power fuse (F1 - 3 Amp) and also a Back-
Up Relay circuit fuse (F2 - 3 Amp).
AC Power Fuse (F1, 3 Amp Slow-Blow)
The
AC Power Fuse
is electrically placed between the
S
3
operating circuitry and the 4-pin header connector
connected by wires to the AC conversion transformer. If power is present at the AC wall receptacle and the
S
3
front panel displays are not ON, check the AC Power Fuse for a blown fuse.
Back-Up Relay Fuse (F2, 3 Amp Slow-Blow)
The
Back-Up Relay Fuse
helps to provide protection between the
S
3
circuitry and the EV-3000/3001. If all
AC power is turned OFF or unplugged at the electrical outlet AND the externally powered controls are also
lacking power, the 3 Amp slow-blow fuse located on the
S
3
circuit board (Fuse F2) should be checked for a
blown fuse.
