10
troubleshooting
Symptom
Possible Cause
Action to Take
The UPS will not turn
UPS is not plugged into an AC
Plug the UPS in and turn it on. If power is still not
on.
outlet and/or is not turned on.
present, make sure the circuit breaker on your building
is not accidentally turned off.
Output short overload shutdown. Reduce the load and reset the circuit breaker (or
replace the blown fuse if so designed).
Computer interface or accessory Disconnect the interface, then press the computer
problem.
reset button.
All LEDs are lit and
Internal UPS system fault.
Return the UPS for service.
the UPS is emitting a
constant tone.
The UPS doesn’t provide The battery is not fully charged. Remove all connected equipment from the UPS and
expected run time.
charge the battery for at least 8 hours. (While the
battery is charging, turn the UPS off to prevent any
unnecessary discharging.)
The battery is old or bad.
Return for service.
Other LEDs are off but The UPS is shut down and the
None. The UPS will return to normal operation when
the Replace-battery LED battery is discharged due to an
the power is restored and the battery regains a
is blinking. No alarm is extended power outage.
sufficient charge.
sounding, but the UPS
is not operating.
