Kiddie smoke alarm (120v with 9v battery backup) experienced 180v power surge (Newfoundland Power company).

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  • Bubbsy 2002
    Senior Member
    • Nov 2010
    • 56
    #1

    Kiddie smoke alarm (120v with 9v battery backup) experienced 180v power surge (Newfoundland Power company).

    Hi to all, I was diagnosing 2 smoke detectors that experienced power surge. I opened one up and found a weird fuse/resistor, which now has open circuit. I can't find this part.
    Forgot to mention they both light up and I believe the test function works, but when I put smoke to them no alarm!

    Any help in this regard would be greatly appreciated.

    Thanks,
    Attached Files
    Last edited by Bubbsy 2002; 01-02-2024, 06:43 PM.
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 31087
      • Albion
      #2
      it's a fuseable resistor.
      what does ZV1 say on it and is it shorted?

        Comment

        • Bubbsy 2002
          #2.1
          Bubbsy 2002 commented
          01-02-2024, 06:40 PM
          Editing a comment
          Thanks again, RV1 looks like another resistor, it has PK on it and has some measurement (I got a .524 kohms). If you look at the word FAILSAFE it looks like it is not installed with this particular smoke detector. Forgot to mention they both light up and I believe the test function works, but when I put smoke to them no alarm!
          Last edited by Bubbsy 2002; 01-02-2024, 06:43 PM. Reason: Additional information added.
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