Tuesday, October 16, 2018

Indication of ups whistling

  • The UPS should not make a whistling noise. You can try a reset to see if the issue clears
    1: Disconnect any attached load.
    2: Unplug the UPS from the wall socket.
    3: Disconnect the UPS' internal battery.
    4: Push and hold the "On" button on the UPS for 5 seconds
    5: Reconnect internal battery.
    6: Plug UPS in to known good power source.
    7: Turn UPS on.
    If the unit continues to whistle after the reset it should be replaced. 

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