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Possible Cause
Symptom
What To Do
Press and release the On/Off/
Test button to start UPS
On/Off/Test button not
pushed
UPS will not turn on
Reset circuit breaker by
pressing the plunger back in.
If the AC circuit breaker trips
after UPS starts up, reduce
the load on the UPS
UPS operates in
battery mode only,
even though there is
normal AC present
Input AC circuit breaker is
tripped
UPS has detected an inter-
nal fault
Call for service
Fault LED is illumi-
nated
The On-Line LED
is illuminated, but
there is no output
Disconnect the computer
cable from the UPS and press
the On button. If UPS works
normally, the software has
control of the UPS
The UPS is being con-
trolled via its communica-
tions port
The batteries may be weak
or at the end of useful
service life
Charge the batteries for 8
hours and retest. -If the
runtime is still less than ex-
pected, the batteries may
need to be replaced, even
though the Weak/Bad Battery
LED is not illuminated
UPS does not pro-
vide the expected
runtime
Weak/Bad Battery
LED is illuminated
Overload LED is
illuminated and a
constant alarm
The On-Line LED is
illuminated and Load
Segment 1 has an
output, but there is
no output from Load
Segment 2
Loose connections at the
batteries, Weak batteries,
Bad batteries
The load has exceeded the
UPS's capacity
The output breaker for Load
Segment 2 is tripped,
Load Segment 2 was
turned off by the software
or the SNMP card
Check battery connections,
charge the batteries for 8-
hours and then retest, replace
the batteries
Check the specifications (see
section 8). Remove part of
the load
Reset the output breaker for
Load Segment 2, turn on Load
Segment 2 by the software or
the SNMP card