
Operation
1. When powered ON, after a short delay (15 seconds) the LEDs on the E-SDS-TAA-V2 will flash (one will be green, the other red)
once every 10 seconds for up to 4 minutes (see TABLE 2 below) after which only the Green LED will blink every 5 seconds to
indicate the sensor is functioning and in status-ready condition.
When smoke is detected or when the temperature exceeds 135°F (57°C) the Red LED will illuminate solid red and the detector will
be placed in Alarm Mode (closing the circuit between N.O. and COM terminals).
To reset the smoke detector to Normal Mode, cycle power to the detector.
Test Switch
An opening for a recessed test switch is located on the detector housing.
1. Insert a small screwdriver or Allen wrench (0.18˝dia. max.) into the test switch opening; push and hold.
2. If the detector is working properly, the detector’s red LED should light within five seconds. To reset the smoke detector to
Normal mode, cycle power to the detector.
TABLE 1: DETECTOR LED MODES
Mode Green LED Red LED
Power-up Blink every 10 sec Blink every 10 sec
Normal (standby) Blink every 5 sec ---
Out of sensitivity --- Blink every 5 sec
Freeze Trouble --- Blink every 10 sec
Alarm --- Solid ON
After an initial power-up delay, the red and green LEDs will blink synchronously once every ten seconds. It will take approximately
80 seconds for the detector to finish the power-up cycle (see Table 2).
TABLE 2: POWER-UP SEQUENCE FOR LED STATUS INDICATION
Condition Duration
Initial LED Status Indication Up to 80 seconds
Initial LED Status Indication if
excessive electrical noise is
present
Up to 4 minutes
NOTE: If, during power-up, the detector determines there is excessive electrical noise in the system such as those caused by
improper grounding of the system or the conduit, both LEDs will blink for up to 4 minutes before displaying detector status (see
Table 2).
Red LED will blink every 10 seconds if the E-SDS-
TAA-V2 senses a temperature below 5˚C (41˚F)
The on-board switch will also close the circuit
between N.O. and COM contacts in Alarm Mode