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I believe it is normal. Just push the mute button.
Sorry, there was a problem. Please try again later.Thank you for your inquiry. The unit shouldn't make any noises other than some slight electrical noises but it shouldn't make an audible noise unless the unit is going to battery or is becoming overloaded. I recommend reaching out to an APCbySchneider support team at your convenience for further assistance in resolving the issue. We offer email and chat services through our support site. For the fastest service visit our chat at https://www.apc.com/us/en/tools/chat/.
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