![]() The Power On LED is illuminated and the Back-UPS beeps 4 times every 30 seconds The Back-UPS is operating on battery power. Contact APC T e chnical Support for more in depth troubleshooting. The battery needs to be charged, or replaced.Beeping stops when utility power is restored or the Back-UPS is turned off. The Back-UPS emits rapid beeping, every 1/2 second. The green LED illuminates with rapid green flashes. Low Battery warning The Back-UPS is supplying battery po wer to the battery backup outlets and the battery is near a total discharge state. The LED is not illuminate d during the beeps. None N/A On Battery Back-UPS supplying battery power to battery backup outlets. ![]() Contact APC Web site, Status LED Indicator Audible Indicato r On Audible Indicator Terminates Power On The Back-UPS is supplying utility power to connected equipment. Return the unit by insured, pre-paid carrier to the address provided by Customer Support.
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