16
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H
Alarm
Message
Alarm
(Morse)
Code
What the Alarm Means
What to Do
LU
Lr
E
(•)
D
(– • •)
Low AC Output. The output volt-
age to the loads is low, so the UPS
shuts down.
Low Runtime. The UPS has been
running on battery power; the bat-
teries are discharging, so the UPS
can only operate on battery for a
short time before shutting down.
The alarm starts when the UPS has
three minutes of battery backup
time left; see the display for the
estimated battery time (runtime).
Follow the proper Customer Process
for Service in Section
Service Support.
Switch off the equipment connected
to the UPS; the UPS will shut down
shortly. When the power outage ends,
the UPS will restart automatically,
and you can restart the equipment
connected to the UPS. Battery time
will be low until the UPS recharges
its batteries.
Lb
A
(• –)
Low Battery. The UPS has run on
battery power for a while and the
batteries are low, so the UPS has
shut down. The alarm will stay on
until the power outage (or power
problem) ends and the UPS can
restart using AC input power.
Shut down any equipment connected
to the UPS. After the power outage
(or power problem) ends, the UPS
will restart automatically; if you do
not want it to do this, call Support
(see
restarts, you can start the equipment
connected to the UPS. Battery backup
time (runtime) will be low until the
UPS recharges its batteries.
Lo
B
(– • • •)
Near Low Battery. The UPS has
run on battery power for a while
and the batteries are near a Low
Battery shutdown. (See alarm
“Lb.”) If the UPS continues to run
on battery, it will soon shut down
and sound a Low Battery (Lb)
alarm. If the UPS switches back to
AC input power before the Lb
shutdown, it will recharge its bat-
teries; the “Lo” alarm will stop as
batteries recharge.
To prepare for the Low Battery shut-
down, switch off the equipment con-
nected to the UPS. If the power out-
age ends before the “Lb” shutdown,
you can restart your equipment. If
not, the UPS will restart automatical-
ly when the power outage or power
problem ends. Restart the equipment
connected to the UPS. Battery time
will be low until the UPS recharges
its batteries.
