It must also be replaced if the amber light flashes and the unit beeps every 40 seconds as this indicates
the sensor is faulty.
(1) Remove the alarm from the mounting plate as described previously.
(2) Pull out the sensor module from the rear.
(3) Replace with a new sensor module (Model No. Ei261MEN - Contact Aico or Ei Electronics, for your
nearest module supplier).
(4) Carefully align the module including the connector pins and push firmly home.
(5) Remove the ‘REPLACE SENSOR BY’ label on the side of the alarm.
(6) Slide the alarm back on to the mounting plate.
(7) Reconnect the mains supply.
(8) Wait 4 minutes for the new sensor to stabilise and then press the Test/Hush button - the horn should
sound.
Note: When the second sensor has completed its period of operation the amber light will flash every 40
seconds. The sensor module can only be replaced once. The entire Alarm must be replaced by the
date given on the ‘REPLACE UNIT BY’ label on the Alarm.
8. LIMITATIONS OF CO ALARMS
8.1 CO Alarms
- The Alarm will not work without mains power and if the rechargeable cells are depleted. The green
power light indicates that the Alarm is receiving mains power.
- Carbon Monoxide must enter the unit for it to be detected. There may be Carbon Monoxide in other
areas of the house (e.g. downstairs, in a closed room etc) but not in the vicinity of the CO Alarm. Doors,
air draughts and obstructions can prevent the CO from reaching the Alarm. For these reasons we
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