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5. TESTING YOUR CO ALARM
(1) Regularly check that the green mains power light is on. The unit cannot detect CO if the mains power
is not on and the rechargeable battery is depleted. (If it is off check circuit breakers, fuses, wiring etc).
(2) Test the unit weekly by pressing the test/hush button. Hold the test button (for up to 10 seconds) until
the horn sounds for over 5 seconds. This will help to familiarise you and your family with the distinctive
on-off sound of the CO Alarm. This test checks that the electronics and horn are working correctly. If the
units are interconnected, button test each unit in turn and check all interconnected units alarm. (If the red
alarm light flashes when the button is pressed (see CO Alarm Memory section 2.3 above).
(3) If the CO Alarm gives a short beep and the amber fault light flashes every 40 seconds it means the
self-checking circuit has detected a fault. Press and hold the test/hush button. If the amber light flashes
without the horn sounding, the sensor is faulty. On the Ei 261DEN the display will show SF indicating
Sensor Faulty.
(4) If the Alarm fails to operate when the test/hush button is pressed, disconnect the mains supply at the
distribution fuse board, remove unit from mounting plate for 3 minutes. Put unit back on mounting plate.
Re-connect the mains and try again. (This procedure resets the microprocessor in the unit).
(5) If the unit beeps every 40 seconds (without a light flash) it means the battery is depleted. (On the Ei
261DEN with depleted cells, the display will show CP to remind you to Connect mains Power). Connect
mains (ensure green light is on) to allow cells to charge.
(6) Once a year check the rechargeable cells by switching off mains and pressing the test button for 10
seconds. The horn should sound loudly. Re-connect mains power.
If the CO Alarm fails any of the above tests it must be replaced immediately (see section 10 “Getting the
CO Alarm Serviced”).
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