Troubleshooting
Problem and/or Possible Cause
Solution
The Site Wiring Fault LED on the rear panel is illuminated (Refer to “Display Panel Indicators” on page 6.)
The UPS is plugged into an improperly wired utility power outlet.
Wiring faults detected include missing ground,
Contact a qualified electrician to correct the building wiring.
There is no utility power
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 8 for additional information. Contact a qualified electrician to correct the building wiring.
Diagnostic utility voltage (Refer to “Utility Voltage Measurement” on page 8.)
All five LEDs are illuminated. | The line voltage is extremely high and should be checked by an electri- |
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There is no LED illumination. | The line voltage is extremely low and should be checked by an electrician. |
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On Line LED (Refer to “Display Panel Indicators” on page 6.)
There is no LED illumination. | The UPS is running On Battery, or it must be turned on. |
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The LED is blinking. | The UPS is running an internal |
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