hager TG551A Guide D'installation page 92

Subject to the smoke detector being properly serviced on a regular basis, it should
be replaced according to the replacement date indicated on the back of the
product or when its battery runs out.
1.2. Description
Fixing base
Test button
92
LED alignment arrow
(gives the alignment axis
of the LEDs once the
detector has been locked
on to its base)
White LED
(emergency halo lighting)
Red LED
(alarm and programming)
Yellow LED
(operation)