4
b. Testing
• Utilise the test button to test the alarm. Do not use naked flames as this does not
replicate smoke and may cause physical damage to the alarm.
Test all your alarms weekly – remember they are life saving devices, protecting
the family and home.
Press and hold the test button until the alarm sounds. All interconnected alarms
will also sound. (Do not stand too close to the alarm during testing – hearing
may be damaged.)
c. Hush Button
• If this feature is fitted temporarily desensitises the alarm circuit for
approximately 7 minutes. This feature is to be used only when a known alarm
condition, such as fumes from cooking, activates the alarm. The alarm is
desensitised by pushing the “HUSH” button on the alarm cover. If the smoke is
not too dense, the alarm will silence immediately and “chirp” every 30-40
seconds for approximately 7 minutes. This indicates that the alarm is in a
temporarily desensitised condition. The alarm will automatically reset after
approximately 7 minutes and sound the alarm if particles of combustion are still
present. The “HUSH” feature can be used repeatedly until the air has been
cleared of the condition causing the alarm. When several alarms are
interconnected, pushing the “Hush” button will hush all but the triggering alarm;
this is signified by a rapidly flashing red LED. For safety reasons can only be
silenced on that alarm.
Note: Dense smoke will override the hush control feature and sound a
continuous alarm.
Caution: Before using the alarm hush feature, identify the source of the smoke
and be certain a safe condition exists. (On heat alarms with hush, the alarms
sensor has detected a high temperature – e.g. 57°C. Check for possible causes
carefully.)
d. Nuisance Alarms
Warning: Persistent nuisance alarms indicates incorrect type and/or siting of
alarm. Review with your installer or Landlord after cleaning as described in
Section 7 (Maintenance).
5. Battery Checking/Changing*
a. Low Battery Indicator (AC models with loose battery only)
If you hear the alarm chirp continuously every 30-40 seconds
(and have not just pressed the hush button) it indicates the battery voltage is at
an unacceptably low level. Replace the battery at the next possible opportunity.
b. Battery Change
i. Firstly isolate the mains supply at the consumer unit by identifying the
appropriate circuit. This may be a dedicated fuse marked “Fire/Smoke
Alarms” or with a symbol such as .
(If you rent your property, your Landlord may arrange this service for you.)
The green L.E.D. should now be out. If not, recheck before proceeding.
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