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TROUBLESHOOTING GUIDE
PROBLEM CAUSE SOLUTION
UPS output short circuited or
overloaded.
Ensure UPS is off. Disconnect all
loads and ensure nothing is
lodged in output receptacles.
Ensure loads are not defective or
shorted internally.
UPS fails to start when On/Off
button is pressed
Internal fuse is blown, indicating
internal fault.
Do not attempt to open or service
the UPS. Contact your dealer or
LTS.
UPS not plugged in. UPS is operating in battery mode,
make certain UPS is securely
plugged into the wall receptacle.
UPS input protection has opened. UPS is operating in battery mode.
Save data and close applications.
Replace UPS input fuse or reset
input breaker, then restart UPS .
Utility indicator flashing
Utility voltage out of UPS input
range.
UPS is operating in battery mode.
Save data and close applications.
Ensure utility supply voltage is
within acceptable limits for UPS.
Batteries not charged. Keep UPS plugged in
continuously at least 24 hours to
recharge batteries.
UPS is overloaded. Check load level display and
remove non essential loads.
UPS has reduced battery time
Batteries may not be able to hold
a full charge due to age.
Replace batteries. Contact your
dealer or LTS for replacement
battery kit.
“Fault” indicator and diagnostic
LED “A” are illuminated
UPS fan failure or battery
overcharge.
UPS requires service. Contact
your dealer or LTS.
“Fault” indicator and diagnostic
LED “B” are illuminated
UPS failed the battery test. Replace batteries. Contact your
dealer or LTS for replacement
battery kit.
UPS shut down. “Fault” indicator
and diagnostic LED “D” are
illuminated
UPS overloaded or load
equipment is faulty.
Check load level display and
remove non essential loads.
Recalculate load VA and reduce
number of loads connected to
UPS. Check load equipment for
faults.
UPS shuts down with the “Fault”
indicator and diagnostic LEDs “A”
& “B” are illuminated
UPS shutdown due to internal
failure.
UPS requires service. Contact
your dealer or LTS.
UPS shuts down with the “Fault”
indicator and diagnostic LEDs “A”
& “D” are illuminated
UPS shutdown due to an internal
over temperature condition.
Ensure UPS is not overloaded,
ventilation openings not blocked,
or room ambient temperature not
excessive. Wait 30 minutes to
allow UPS to cool, then restart
UPS. If it does not restart,
contact your dealer or LTS.
UPS shuts down with the “Fault”
indicator and diagnostic LEDs “B”
& “D” are illuminated
UPS shutdown due to a command
from the communications port(s).
Your UPS has received a signal
or command from the attached
computer. If this was inadvertent,
ensure the communication cable
used is correct for your system.
For assistance, contact your
dealer or LTS.
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