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HOW TO DISCONNECT AND REMOVE THE ALARM:
(1) Disconnect the mains supply to the CO Alarm circuit at the distribution/fuse board.
(2) Remove tamperproofing screw if fitted (see Figure 1).
(3) Release catch (as shown in Figure 1) and slide unit off mounting plate.
SENSOR MODULE REPLACEMENT
Replace the sensor module after 5 years operation (or by the date on the ‘REPLACE SENSOR BY’
label on the side of the unit). After 5 years operation, the amber light will flash once every 40 seconds
(without a beep) to indicate the sensor should be replaced.
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.
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