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Troubleshooting
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9.0 TROUBLESHOOTING
The information below indicates various symptoms a user may encounter if the Liebert PSI XR expe-
riences a problem. See Table 9 for suggested solutions.
1. An alarm sounds, alerting that the UPS requires attention. The alarm can be silenced except for
low battery, overload warning and fault.
2. One or more additional indicators will be illuminated to provide a diagnostic aid to the operator,
as described below:
If the UPS fails to operate properly, turn Off the unit and repeat the steps in 3.0 - Installation. If the
problem persists, refer to Table 9.
Table 9 Troubleshooting—problems, causes and solutions
Problem Cause Solution
UPS will not start
Short circuit
Check the circuit breaker on the
rear of the UPS.
If it is tripped, reset it and restart the
UPS. For help, contact your local
dealer, Emerson representative or
Liebert Applications.
Battery is disconnected or
completely discharged
Check for proper connection of
battery or batteries.
UPS starts on battery, but will not
switch to AC (dark start)
UPS not plugged in Plug in the power cord securely.
Circuit breaker tripped
Reset the circuit breaker and restart
the UPS.
AC overvoltage
Wait until voltage drops to an
appropriate level or have the utility
power checked by a properly
trained and qualified electrician.
UPS shuts down
Short circuit or UPS output is
abnormal; LED 10 and LED 11
illuminate and sound audible
alarm
Remove the load and turn on the
UPS again. For help, contact your
local dealer, Emerson
representative or Liebert
Applications.
Overload; LED 5 and LED 11
illuminate and sound audible
alarm
Check load level display and
remove nonessential loads.
Recalculate the load and reduce
equipment connected to UPS - the
total wattage must not exceed the
capacity of the UPS.
LED 3 and LED 11 illuminate and
sound audible alarm
Recharge the battery for 8 hours,
then turn ON the UPS.
Liebert MultiLink shutdown
software
Consult the Liebert MultiLink
software user manual or contact
your LAN administrator.
Site Wiring Fault LED (LED 4) flashing
Site Wiring Fault, UPS detected a
line-to-neutral reversal or a loss of
proper grounding.
Have the utility checked by a
properly trained and qualified
electrician.
Battery weak LED (LED 3) flashing
Batteries weak Recharge batteries.
Batteries need to be replaced Replace batteries.
NOTE
The 1920VA UPS will sound an Overload alarm under certain Low Line conditions when it is
fully loaded and it exceeds the input current rating. Unless the load is reduced, the condition
will trip the branch circuit breaker.