Smart-UPS 750-3000 VA 100/120/208/230 Vac Rack-Mount12
Troubleshooting
Problem and Possible Cause Solution
The UPS will not turn on or there is no output.
The unit has not been turned on. Press the
ON
key once to turn on the UPS.
The UPS is not connected to utility
power.
Be sure the power cable is securely connected to the unit and to the utility
power supply.
The input circuit breaker has tripped. Reduce the load on the UPS. Disconnect nonessential equipment and reset the
circuit breaker.
The unit shows very low or no input
utility voltage.
Check the utility power supply to the UPS by plugging in a table lamp. If the
light is very dim, check the utility voltage.
The battery connector plug is not
securely connected.
Be sure that all battery connections are secure.
There is an internal UPS fault. Do not attempt to use the UPS. Unplug the UPS and have it serviced
immediately.
The UPS is operating on battery, while connected to input utility power.
The input circuit breaker has tripped. Disconnect nonessential equipment and reset the circuit breaker.
There is very high, very low, or
distorted input line voltage.
Move the UPS to a different outlet on a different circuit. Test the input voltage
with the utility voltage display. If acceptable to the connected equipment,
reduce the UPS sensitivity.
UPS is emitting an audible beeping sound.
The UPS is operating normally. None. The UPS is protecting the connected equipment.
UPS does not provide expected backup time.
The UPS battery is weak due to a
recent power outage or is near the end
of its service life.
Charge the battery. Batteries require recharging after extended outages and
wear out faster when put into service often or when operated at elevated
temperatures. If the battery is near the end of its service life, consider
replacing the battery even if the replace battery LED is not illuminated.
The UPS is experiencing an overload
condition.
Check the UPS load display. Unplug unnecessary equipment, such as printers.
Display interface LEDs flash sequentially.
The UPS has been shut down remotely
through software or an optional accessory
card.
None. The UPS will restart automatically when utility power is restored.
The Fault LED is illuminated. The UPS displays a fault message and emits a constant beeping sound.
Internal UPS fault. Do not attempt to use the UPS. Turn the UPS off and have it serviced
immediately.
All LEDs are illuminated and the UPS is plugged into a wall outlet.
The UPS has shut down and the
battery has discharged from an
extended outage.
None. The UPS will return to normal operation when the power is restored
and the battery has a sufficient charge.
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