IE 326S-2L -
TECHNICAL MANUAL
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090010285
10
11.3 Operational test
All the alarm signal services, releasing devices and the extinguisher system should be disengaged during
the test procedure and rnust be re-engaged immediately after the conclusion of testing.
- After energizing the detector head for approximately one minute, check to see if the green LED indicator
flashes once every 3-5 seconds. If LED fails to flash, it indicates the non-functioning of the detector or
faulty wiring. Re-check the wiring or replace the detector if necessary.
- Allow smoke from a cotton wick or a test smoke aerosol (IESS AEROSOL) to enter the detector-sensing
chamber for at least 10 seconds.
- When sufficient smoke has entered the chamber, the detector will signal an alarm, this being visible by a
continuous illumination of the LED (red fixed light).
- Reset each detector and/or control unit before attempting to test any additional detectors in the same
zone. If the alarm fails in this step, it indicates that unit is defective and requires service.