On 04/12/2018 11:50 AM, Ben Koenig wrote:
Oh, so you are saying its more like an electrical sound and not a speaker.
So not a beep, but a failing capacitor or fan or something. That sounds
more serious, I would replace the unit immediately.

No, it's not squealing capacitor. It's the sound the unit makes when it does its thing, switching to battery or whatever it's doing when it senses a problem with the line voltage.


Dick Steffens

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