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Troubleshooting
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Table 3 Troubleshooting guide
Problem
Cause Solution
UPS fails to start when the
ON button is pressed.
UPS is 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.
Battery indicator LED is
illuminated.
UPS not plugged in.
UPS is operating from battery mode, make certain UPS is
securely plugged into the wall receptacle.
UPS input protection has
opened.
UPS is operating from battery mode. Save data and close
applications. Check UPS input circuit breaker, then restart
UPS.
Utility voltage out of UPS
input range.
UPS is operating from battery mode. Save data and close
applications. Ensure utility supply voltage is within acceptable
limits for UPS.
UPS has reduced battery
time.
Batteries are not fully
charged.
Keep UPS plugged in continuously at least 24 hours to
recharge batteries.
UPS is overloaded. Check load level display and reduce the load on the UPS.
Batteries may not be able to
hold a full charge due to age.
Replace batteries. Contact your local dealer, Liebert
representative or the Liebert Worldwide Support Group for
replacement battery kit.
Fault and Bypass indicator
LEDs and all load level LEDs
are illuminated.
UPS overloaded or load
equipment is faulty.
Check load level display and remove non-essential loads.
Recalculate the load and reduce number of loads connected to
UPS. Check load equipment for faults.
Fault and Bypass indicator
LEDs and diagnostic LED A
are illuminated.
UPS internal fan has a
problem or UPS shutdown
due to temperature condition.
Load is on bypass power.
Ensure UPS is not overloaded, ventilation openings not
blocked, or room ambient temperature is not excessive. Wait
30 minutes to allow UPS to cool, then restart UPS. If UPS does
not restart, contact your local dealer, Liebert representative or
the Liebert Worldwide Support Group.
Fault and Bypass indicator
LEDs and diagnostic LED B
are illuminated.
UPS internal DC bus
overvoltage.
UPS requires service. Contact your local dealer, Liebert
representative or the Liebert Worldwide Support Group.
Fault indicator LED and
diagnostic LED C are
illuminated.
DC-DC failure during battery
mode.
Bus voltage under 315VDC (O/P 220VAC) / 330VDC
(O/P 230VAC) / 345VDC (O/P 240VAC). UPS requires service.
Contact your local dealer, Liebert representative or the Liebert
Worldwide Support Group.
Fault and Bypass indicator
LEDs and diagnostic LED D
are illuminated.
UPS PFC (Power Factor
Correction Circuit) fault.
UPS requires service. Contact your local dealer, Liebert
representative or the Liebert Worldwide Support Group.
Fault and Bypass indicator
LEDs and diagnostic LED E
are illuminated.
UPS inverter fault.
UPS requires service. Contact your local dealer, Liebert
Representative or the Liebert Worldwide Support Group.
Fault indicator LED and
diagnostic LEDs A and C are
illuminated.
UPS failed the battery test.
Replace batteries. Contact your local dealer, Liebert
representative or the Liebert Worldwide Support Group.
Fault and Bypass indicator
LEDs and diagnostic LED C
and E 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 local dealer, Liebert representative or the Liebert
Worldwide Support Group.
Fault and LEDs A&E are
Illuminated
Fan locked
Check for external obstruction entering fan guard. UPS
requires service. Contact your local dealer, Liebert
representative or Liebert Worldwide Support Group.
Fault and LEDs B&C are
Illuminated
REPO active
REPO circuit loop is open. If not used, a wire jumper must
connect the REPO terminals.
Fault and LEDs B&D are
Illuminated
UPS is OFF due to previous
REPO shutdown, but the
REPO has been connected
or reset. Autorestart
disabled.
Start the UPS using the front panel.