Ei Electronics Ei 261EN - Manual (Page 23)

After 5 years operation, the amber light will flash once every 40 seconds (without a beep) to indicate the
sensor should be replaced. (Note: cover the ‘replace sensor’ label on side of unit with the new ‘replace
unit’ by label supplied with the new sensor).
It must also be replaced if the amber light flashes and the unit beeps every 40 seconds as this indicates
the sensor is faulty.
Remove the alarm from the mounting plate as described above. Pull out the sensor module from the rear.
Replace with a new sensor module (Model No. Ei 261MEN) (Contact Aico or Ei Electronics, for your near-
est module supplier). Carefully align the module including the connector pins and push firmly home. Slide
the alarm back on to the mounting plate. Reconnect the mains supply. Wait 4 minutes for the new sensor
to stabilise and then press the test button - the horn should sound.
Check the alarm as described in section 4 above.
Note: When the second sensor has completed its 5 years of operation the amber light will flash every 40
seconds. The sensor module can only be replaced once. The entire unit must be replaced after 10 years.
The date for replacing the entire unit is given on the base.
7. LIMITATIONS OF CO ALARMS
(1) The Ei 261EN/261DEN CO Alarm will not work without mains power if the rechargeable cells are
depleted. The green power light must be on at all times as far as possible.
(2) 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 reaching the Alarm. For these reasons we recommend
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