Troubleshooting
Problem and/or Possible Cause
Solution
Fault and Overload LEDs illuminated and UPS emits a sustained alarm tone (Refer to “Display Panel Indicators” on page 8.)
The UPS has ceased sending power to connected equipment.
The connected equipment exceeds the specified “maximum load” as defined in Specifications on the APC Web site, www.apc.com.
Disconnect nonessential equipment from the UPS to eliminate the overload condition.
Press the | button, then the | button to restore power to connected |
equipment. |
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The Replace Battery/Battery Disconnected LED is illuminated (Refer to “Display Panel Indicators” on page 8.)
Battery is disconnected. | Check that the battery connectors are fully engaged. | |
flashes and a short beep is emitted |
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every two seconds to indicate the |
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battery is disconnected. |
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Weak battery. | Allow the battery to recharge for 24 hours and perform a | |
| problem persists after recharging, replace the battery. | |
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Failure of a battery | Allow the battery to recharge for 24 hours. Perform the | |
flashes and a short beep is emitted | confirm the replace battery condition. The alarm stops and the LED clears if | |
the battery passes the | ||
for one minute. The UPS repeats the | ||
alarm every five hours. | If the battery fails again, it must be replaced. UPS output is maintained | |
| during the | |
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There is no utility power |
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There is no utility power and the UPS is off.
Use the cold start feature to supply power to the connected equipment from the UPS battery.
Press the 
button for one second and release. The UPS will beep briefly.
Press and hold the 
button again for about three seconds. The unit will emit two beeps. Release the button during the second beep.
UPS operates On Battery although line voltage exists
Your system is experiencing very high, low, or distorted line voltage.
The generator is not correctly sized.
Move the UPS to a different outlet on a different circuit: Inadequately sized generators may distort the voltage. Test the input voltage with the utility voltage display. Refer to “Utility Voltage Measurement” on page 9 for additional information. Contact a qualified electrician to correct the building wiring.
Diagnostic utility voltage (Refer to “Utility Voltage Measurement” on page 9.)
All five LEDs are illuminated.
The line voltage is extremely high and should be checked by an electrician.
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