I have an APC Smart-UPS X 1500V which I just connected to a power source. When I turned the device on it was beeping and giving a flashy red light at the most right icon of the control panel.

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The error message "Warning State: Connect Battery" was displaying on the screen of the control panel.

I tried resetting the device to factory defaults.

What is causing this and how can I fix this issue?

  • 3
    You say you just connected it to a power source. Did you also just purchase it? Most UPSes ship with a cable disconnected from the battery that you need to reconnect before plugging it in. Jul 7, 2015 at 11:51
  • @ChrisPowell No, I didn't just buy it, we had it in use for the company and it got replaced, now when i'm trying to start it back up, i get this error. The battery in this device is placed in 2012. The cable for the battery is well plugged in.
    – Bas
    Jul 7, 2015 at 11:52
  • Just looked at the manual for that UPS. APC describes it as the "Replace Battery" indicator. Is it possible your battery has gone bad? Jul 7, 2015 at 11:57
  • 1
    If anything else besides the battery is bad then it would be easier to buy a new UPS. Jul 7, 2015 at 12:10
  • 1
    Lead-acid batteries usually have a ~5 - 7 year lifetime when well maintained, but left unplugged, the battery likely completely discharged and can no longer hold a full charge. Even if the supply runs after charging it for a while, test it under load. Jul 7, 2015 at 15:36


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