Troubleshooting Chart - Liebert 500-650 VA User Manual

Troubleshooting Chart

If the UPS fails to operate properly, turn off the unit and repeat the
steps in the Installation section of this manual. If the problem per-
sists, refer to the chart below:
Problem
UPS will not
start
UPS starts
on battery,
but will not
switch to AC
UPS shuts
down, Fault
Indicator lit
UPS not
providing
expected
backup time
Cause
Overload/
Short circuit
UPS not plugged in
Circuit protector
tripped
Power not available
at mains receptacle
Input voltage below
threshold
AC overvoltage
Overload/
Short circuit
Internal UPS fault
Overload
Battery not charged
due to a recent
outage
Check the circuit protector on the side
of the UPS. If it is tripped, reset it and
restart the UPS.
For further help, call your local dealer,
Liebert representative or the Liebert
Worldwide Support Group.
Plug in power cord securely.
Reset the circuit protector and restart
the UPS.
Have the mains receptacle checked
by a qualified electrician.
Wait until the voltage rises to an
appropriate level or have the mains
receptacle checked by a qualified
electrician.
Wait until voltage lowers to an
appropriate level or have the mains
receptacle checked by a qualified
electrician.
Check the circuit protector on the rear
of the UPS. If it is tripped, reset it and
restart the UPS.
If the problem persists, disconnect
some of the equipment from your
UPS—the total wattage of your
equipment must not exceed the
capacity of the UPS. For further help,
call your local dealer, Liebert
representative or the Liebert
Worldwide Support Group.
Reduce load.
Recharge battery.
16
Solution