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Troubleshooting
26
Under fault conditions, the Fault indicators will be illuminated indefi-
nitely while battery charger is operational, or for a maximum of 5 min-
utes while battery charger is not operational.
If a problem persists, consult your local dealer, Liebert representative
or contact the Liebert Worldwide Support Group. Please have the UPS
model number and serial number available at the time of your
inquiry.
Table 1 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 fuse
has blown/opened.
UPS is operating from
battery mode. Save data
and close applications.
Replace UPS input fuse,
then restart UPS.
Mains voltage out of UPS
input range.
UPS is operating from
battery mode. Save data
and close applications.
Ensure mains 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.