APC AVR LS1000-MS 1000VA 230V constant noise

[kelmen]

i just bought this

APC AVR LS1000-MS 1000VA 230V

https://shopee.com.my/APC-AVR-LS1000-MS-1000VA-230V-LS1500-MS-1500VA-240V-LINE-R-AUTOMATIC-VOLTAGE-R...

started it up and here is the constant noise

https://drive.google.com/file/d/1IKU4CXMgqXml26dnl9qk8qBB5UJOkumL/view?usp=sharing

faulty device? going to explode soon?

[JonPro]

Hi @kelmen 

Thank you for reaching out to the SE Community, my name is Jon and I will assist you with this query.

Apologies for the late revert, may I know if the sound is accompanied by a flashing LED at the back of the LineR?  Kindly check as well the voltage that is being fed to the unit and try changing the voltage selector at the back.