13. Troubleshooting
Problem
Possible Cause
Corrective Action
Unit will not turn ON
ON/TEST button not pushed or
Press the ON/TEST button for more than 2
seconds to power the UPS and load.
not pushed long enough.
Fuse is blown or the
circuit breaker has tripped.
V
Output short circuit, or UPS is
overloaded.
ery low or no utility voltage.
Check
To remove short circuited equipment or
overload, disconnect connected equipment
then re-set the circuit breaker.
the AC power supply to the UPS.
UPS will not turn ON or OFF
Computer interface or accessory
Disconnect the computer interface or
problem. ON/TEST or OFF button
accessory. If the UPS then functions
not pushed long enough.
normally, check the interface cable, the
attached computer and/or the accessory.
UPS operates on battery even
UPS’s input circuit breaker tripped, or
input fuse is blown.
Remove connected loads from the UPS by
though line voltage is apparently
unplugging equipment and reset the circuit
breaker.
Remove connected loads from the UPS by
unplugging equipment and reset the circuit
breaker.
present
UPS beeps slowly
Normal UPS operation.
None – the UPS is supporting the load.
UPS
Front panel indicators flash
sequentially (LED models)
All indicators are flashing and
UPS emits a constant tone
UPS operates normally, but the
site wiring fault indicator is on.
does not provide expected
The UPS's battery is not fully recharged
due to recient use or it is near the end
of its service life.
Charge the battery. If the battery is near
back-up time
the end of its service life, consider replacing
it, even if the fault code "E07" has not been
displayed yet.
The
The UPS has shut down by remote
control.
Internal UPS fault.
Building wire error - e.g. missing Ground
or Hot and Neutral wires are reversed.
UPS is overloaded.
Check
None - The UPS will restart automatically
when the utility power returns if configured
to do so, or manually turned on.
Do not attempt to use the UPS. Turn it off,
power it down and have it serviced.
Have a qualified electrician correct the
building wiring.
Low battery light is ON and all
LED's are OFF
The UPS has shut down and the battery
has been discharged or depleted.
None - The UPS will return to normal
operation when the utility power is restored
and the battery is sufficently recharged.
Replace battery light is ON
Faulty batteries.
The batteries may need to be recharged
for at least 4 hours. Should the problem
persist - replace with new batteries.
the UPS’s load display and remove
noncritical loads.
13. Troubleshooting
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