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Weak or bad batteries/bad bat-
tery connection
Normal operation
UPS will not turn on
Fault LED is
illuminated
The Site Wiring Fault
LED is illuminated
The Online/On
battery LED is
illuminated, but there
is no output
5
Press On button momentarily,
(one beep) to start UPS
On / Off / Test button not
pushed
UPS operates in
battery mode only,
even though there is
normal AC present
Input AC breaker is tripped
UPS has detected an internal
fault
Reset circuit breaker by pressing
the plunger back in. If circuit
breaker trips after UPS starts up,
reduce the load on the UPS
Call for service
Incorrect service wiring
Have a qualified electrician
correct the service wiring
Disconnect the computer cable
from the UPS and press the On
button momentarily. If UPS works
normally, software has control of
the UPS
The UPS is being controlled via
its computer port
The batteries may be weak or
at the end of useful service
life
Charge the batteries for 8 hours
and retest. If the backup time is
still less than expected, the
batteries may need to be
replaced, even though the
replace battery LED is not
illuminated
UPS does not provide
expected backup time
Check the battery connection and/
or replace the batteries. Follow
battery replacement procedures
in section 6.
The UPS is performing its intended
function
Replace battery LED is
illuminated
The UPS occaisionally
emits a beep
TROUBLESHOOTING
TROUBLESHOOTING CHART
Possible CauseSymptom What To Do
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