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How to troubleshoot 755PSMA4 Smoke Alarm if it is beeping after replacing the battery ?

FAQ000191356

11 April 2021

Red LED flashing once every 40 seconds with one audible beep is a low battery warning.
Replace the 9 V d.c. battery with a new one. (It is recommended to replace the battery annually)
To snooze a low battery beep for 10 hours, press the Test/Hush button for 3 seconds.

And if the smoke alarm continues to beep once every 40 seconds after a new battery replacement,
  • Unclip the alarm from the base.
  • Remove the new battery.
  • ​​​Press and hold the test button for 20 seconds. 
  • Replace the new battery and clip it back to the base.

755PSMA4 - Operating Elements.png