This means that the backup battery needs to be replaced. This signal will sound for 30 days.Press the test button shortly to stop this signal for 10 hours.

Replacing the battery:

• Turn off the power
• Remove the smoke alarm from the base plate
• Remove the battery.
• Press the test button until there are no more light and sound signals. This is to remove the last bit of power from the smoke alarm. This allows the smoke alarm to reset itself correctly.
• Thoroughly vacuum the smoke alarm with a vacuum cleaner. This is advised to be done monthly to avoid false alarms. With monthly maintenance, the smoke alarm does not have to be removed from the ceiling, it is also possible by using the long rod of the vacuum cleaner.
• Place a new battery in the smoke alarm. ATTENTION: ATTENTION THE PLUS AND THE MINUS
• Leave the smoke alarm for 10 seconds.
• Use the test button to test your smoke alarm.
• Place the smoke alarm back on the base plate.
• Switch on the power.

The smoke alarm detects a defect and must be replaced by a new smoke alarm.

One of the linked smoke alarms has a weak battery.

One of the linked smoke alarms generates an alarm.

A false alarm, after a period of proper functioning, is mostly caused by dust (particles) in the smoke chamber, or wrong location of the smoke alarm.

Click here for the list of places not suitable for installation of a smoke alarm.

It is very important a smoke alarm is maintained properly from the day of installation, see your user manual. To maintain your smoke alarm, it is sufficient if you monthly vacuum clean along the side of the smoke alarm with the brush on the long rod of the vacuum cleaner.

If you do not do this, the smoke chamber will gradually contaminate, and as soon as the contamination reaches a certain level, the smoke alarm will start giving a faulty alarm. This is not covered by the warranty as it is caused by poor maintenance.

If contamination of the smoke chamber is causing the faulty alarm, what you can try is to thoroughly vacuum clean your smoke alarm on all visual openings:

• Turn off the power
• Remove the smoke alarm from the base plate
• Remove the battery.
• Press the test button until there are no more light and sound signals. This is to remove the last bit of power from the smoke alarm. This allows the smoke alarm to reset itself correctly.
• Thoroughly vacuum clean the smoke alarm with a vacuum cleaner.
• Place the battery back into the smoke alarm. ATTENTION: ATTENTION THE PLUS AND THE MINUS
• Leave the smoke alarm for 10 seconds.
• Use the test button to test your smoke alarm.
• Place the smoke alarm back on the base plate.
• Switch on the power.

If this does not help the last possible solution is the use of compressed air.

Unfortunately, if this also does not help, the smoke chamber contamination is so deep that it is beyond repair and the smoke alarm will have to be replaced.

• Test your smoke alarm monthly and after a period of absence
• Clean the smoke alarm regularly (once a month) with the soft brush of the vacuum cleaner

This smoke alarm has a replaceable 9V backup battery. This backup battery guarantees the operation of your smoke alarm in the event of a power failure. Most home fires start in the fuse box. The backup battery ensures that your smoke alarm continues to function in the event of a power failure.

• Turn off the power
• Remove the smoke alarm from the base plate
• Remove the battery.
• Press the test button until there are no more light and sound signals. This is to remove the last bit of power from the smoke alarm. This allows the smoke alarm to reset itself correctly.
• Thoroughly vacuum the smoke alarm with a vacuum cleaner.
• Place the new battery in the smoke alarm. ATTENTION: ATTENTION THE PLUS AND THE MINUS
• Leave the smoke alarm for 10 seconds.
• Use the test button to test your smoke alarm.
• Place the smoke alarm back on the base plate.
• Switch on the power.