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My UPS is not working

Troubleshooting steps to resolve common UPS (Uninterruptible Power Supply) issues and ensure backup power protection.

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Written by Dragan Ranisav
Updated over 3 weeks ago

If your UPS isn't working or providing backup power protection, your equipment may be vulnerable to power outages and surges.

Follow the troubleshooting steps below to quickly identify and resolve common UPS problems:

  • Check the power connections

    • Ensure your UPS is plugged into a working wall outlet and that the power cable is securely connected. Verify that your equipment (till, printers, etc.) is plugged into the UPS outlets, not directly into the wall.

  • Check the UPS power switch

    • Locate the power button or switch on your UPS unit and ensure it's turned on. Some UPS units have separate switches for the unit itself and the outlets. Check that both are in the "on" position.

  • Check indicator lights and display

    • Look at the UPS indicator lights or LCD display for status information. Common indicators show power status, battery level, load capacity, and any fault conditions. Refer to your UPS manual for what each light or icon means.

  • Test the battery backup

    • Unplug the UPS from the wall outlet briefly to see if it switches to battery power and keeps your equipment running. If your devices shut off immediately, the battery may be depleted or faulty. Plug the UPS back into the wall outlet.

  • Check for overload conditions

    • Verify you haven't connected too many devices or devices that draw too much power. Check the UPS display or lights for overload warnings. Disconnect some devices and see if the UPS functions normally.

  • Allow the battery to recharge

    • If the battery is depleted, plug the UPS into the wall and allow it to charge for several hours (typically 4-8 hours for a full charge). Do not disconnect it during this time. Check the battery indicator to monitor charging progress.

  • Check for audible alarms

    • Listen for any beeping or alarm sounds from the UPS. Continuous beeping often indicates the UPS is running on battery power or there's a fault condition. Refer to your UPS manual to interpret the beep pattern.

  • Reset the UPS

    • Some UPS units have a reset button or require a specific reset procedure. Check your UPS manual for reset instructions. Typically, this involves unplugging the unit, pressing and holding the power button, then reconnecting it.

  • Verify circuit breakers

    • Check if any circuit breakers on the UPS itself have tripped. Some UPS units have built-in circuit breakers on the back or side panel. Reset any tripped breakers by switching them off and back on.


If your UPS still isn't working after trying these steps, raise a support case with our team. Include the following information:

  • Your UPS model and serial number.

  • The age of the UPS and how long you've been using it.

  • What indicator lights or error messages are displayed.

  • Whether UPS has ever worked properly.

  • What devices are connected to the UPS.

  • Any beeping patterns or alarm sounds.

  • The troubleshooting steps you've already completed.

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