9
to make one a repeater, or rotate / re-locate the units. There
are a number of reasons why the radio link signals may not
reach all the smoke alarms in your system (see section 10.2
on “Limitations of Radio Frequency Signals”). However, you
should try making one unit into a repeater, rotating the smoke
alarms or re-locating the smoke alarms (e.g. move them away
from metal surfaces or wiring).
Rotating and/or re-locating the smoke alarms may move
them out of the range of existing smoke alarms even though
they may have already been house coded correctly in the
system. It is important therefore to check that all detectors
are communicating in their final installed positions. If smoke
alarms are rotated and/or resited, we would recommend
that all the smoke alarms are returned to the factory settings
and then house coded again in their final positions (see
section 6.0). The radio link interconnection should then be
re-checked again.
6. HOUSE CODING YOUR ALARMS
House coding your alarms will prevent neighbouring alarm
systems from setting off your own alarms and vice versa.
The house coding process changes the radio signal from the
common factory signal to a unique radio code for each unit.
6.1 House Code Procedure
Ensure that the battery is connected to all alarms before
beginning the house code procedure.
1. Open the cover by pulling the tab. Press the house code
switch and hold until the amber light comes on and then
release. The amber light will then flash rapidly for about 1
second to indicate the unit is now in the house code mode
(see figure 9).
2. Similarly press and hold the house code switch on the
second installed unit until its amber light comes on and then
release. Put all the remaining alarms into the house code
mode in the same manner.
3. When in the house code mode, the amber light will flash a
number of times every 5 seconds to indicate:
(a) the alarm is in house code mode and
(b) the number of units that have been identified as being part
of your system.
For example with 3 alarms in your system, you should see
3 amber light flashes every 5 seconds, with 4 alarms in your
system you should see 4 amber light flashes and so on. The
maximum number of light flashes that can be seen is 12. It is
recommended that a maximum of 12 units are interconnected.
(Please note that during the house coding process one alarm
may sound for 1 minute.)
Check that the number of amber light flashes corresponds to
the number of units in the system. If not see section 5.2.
