Ei Electronics Ei207 Series Instruction Manual page 32

If it is not convenient to replace immediately the batteries or the Alarm (as applicable), then
press the test button to silence the low battery beeps for 12 hours. This can be repeated
as required.
Sensor Fault
If a sensor fault has been detected the Alarm will give 2 short beeps with 2 yellow LED
flashes about every 48 seconds. The Alarm must be replaced when this fault occurs.
If it is not convenient to replace it immediately, then press the test button to silence the
sensor fault beeps for 12 hours. The sensor fault can only be silenced once.
End of Life
When the sensor has reached its End of Life, the Alarm will give 3 short beeps with 3 yellow
LED flashes about every 48 seconds. This indicates that the Alarm must be replaced.
If it is not convenient to replace it immediately, then press the test button to silence the End
of Life beeps for 24 hours. This can be repeated for a maximum of 30 days.
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