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8. Troubleshooting
Problem Possible Cause Solution
UPS will not turn on.
On/test button not
pushed.
Press the on/test button to power the UPS
and the load
UPS input circuit breaker
tripped.
Reduce the load on the UPS by unplugging
equipment and reset the circuit breaker by
pressing the plunger back in.
Very low or no utility
voltage.
Check the AC power supply to the UPS.
UPS will not turn on or
off.
Computer interface or
accessory problem.
Disconnect the computer interface or
accessory. If the UPS now works normally,
check the interface cable, the attached
computer, and the accessory.
UPS operates on-battery
even though normal line
voltage is thought to exist.
UPS's input circuit breaker
tripped.
Reduce the load on the UPS by unplugging
equipment and reset the circuit breaker.
Very high, low, or
distorted line voltage.
Test the input voltage with the utility
voltage display. See section 5.6.
Inexpensive fuel powered generators can
distort the voltage. If acceptable to the
load, reduce the UPS's sensitivity. See
section 5.9.
UPS beeps occasionally. Normal UPS operation. None. The UPS is protecting the load.
UPS does not provide
expected back up time.
The UPS's battery is weak
due to recent outage or is
near the end of its service
life.
Charge the battery. The UPS's batteries
require recharging after an extended
outage. Batteries wear faster when put into
service often and 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 indicator is not yet lit.
The UPS is overloaded.
Check the UPS's load display. See section
5.4. Unplug less needed equipment, such
as printers.
Front panel indictors
flash sequentially.
The UPS has been shut
down by remote control.
None. The UPS will restart automatically
when utility power returns.
All indicators are lit and
the UPS emits a constant
tone.
Internal UPS fault.
Do not attempt to use the UPS. Turn the
UPS off and have it serviced immediately.