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Chapter
3.
Uninterruptible
power
supply
controls,
LEDs,
operating
modes,
and
power
This
chapter
describes
the
controls,
light-emitting
diodes
(LEDs),
connectors,
operating
modes,
and
how
to
turn
the
uninterruptible
power
supply
on
and
off.
Front
view
The
following
illustration
shows
the
controls,
LEDs,
and
connectors
on
the
front
of
the
uninterruptible
power
supply.
Load level LEDs
On button
Off button
Alarm reset button
General alarm LED
On battery LED
Battery service LED
Site wiring fault LED
Power on LED
For
more
information
about
the
LEDs,
see
“Operating
modes”
on
page
18
and
Table
6
on
page
39.
General
alarm
LED:
When
this
LED
is
red
and
flashing
and
the
alarm
beeps
every
5
seconds,
the
uninterruptible
power
supply
is
charging
the
battery.
When
this
LED
is
red
and
flashing
and
the
alarm
beeps
continuously,
the
uninterruptible
power
supply
internal
temperature
is
too
high.
When
this
LED
is
flashing
and
there
is
no
alarm
beep,
the
battery
is
recharging.
On
battery
LED:
When
this
LED
is
lit,
the
uninterruptible
power
supply
is
running
on
battery
power.
When
this
LED
is
flashing,
the
battery
capacity
is
low.
Battery
service
LED:
When
this
LED
is
red
and
flashing,
the
battery
is
not
connected
correctly
or
the
battery
needs
to
be
replaced.
Site
wiring
fault
LED:
When
this
LED
is
red
and
flashing,
there
are
problems
with
the
wiring
outside
the
uninterruptible
power
supply.
Power-on
LED:
When
this
LED
is
green,
the
uninterruptible
power
supply
is
in
Normal
mode.
When
this
LED
is
red,
the
uninterruptible
power
supply
is
in
Bypass
mode.
When
this
LED
is
flashing,
the
uninterruptible
power
supply
is
in
standby
mode.
Note:
If
this
LED
is
off,
it
does
not
mean
that
there
is
no
electrical
power
in
the
uninterruptible
power
supply.
The
LED
might
be
burned
out.
To
remove
all
electrical
power
from
the
uninterruptible
power
supply,
you
must
disconnect
the
power
cord
from
the
electrical
outlet.
On
button:
Press
this
button
to
turn
on
the
uninterruptible
power
supply.
Off
button:
Press
this
button
to
turn
off
the
uninterruptible
power
supply.
©
Copyright
IBM
Corp.
2006
17
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