LTCU
SERIES
USER
MANUAL
Thank
you
for
selecting
this
UPS.
It
provides
you
with
better
protection
for
connected
equipments.
Please
read
this
manual!
This
manual
provides
safety,
installation
and
operation
instructions
which
will
guide
you
to
the
best
performance
of
your
equipment.
Please
save
this
manual!
It
includes
important
instructions
for
the
safe
usage
of
the
equipment
and
to
obtain
manufacturer’s
support
in
case
of
need.
Please
keep
or
recycle
the
packaging
materials!
Packaging
materials
used
in
our
products
are
designed
to
provide
protection
from
transportation.
These
materials
are
necessary
in
case
that
the
equipment
needs
to
be
shipped
back
for
service.
Damage
that
may
occur
during
the
shipment
is
not
covered
by
the
product’s
warranty.
1.
INTRODUCTION
1
‐
1
System
Description
The
product
is
line
interactive
UPS
with
LCD
display,
newest
technology
and
powerful
function.
The
line
interactive
UPS
is
designed
with
2
steps
boost
and
1
step
buck
AVR
to
stabilize
input
voltage.
Input
voltage
range
is
‐
30%,
+25%,
but
output
regulation
is
+/
‐
10%.
The
line
interactive
UPS
provides
you
with
the
ability
of
perfect
protection
for
your
critical
devices.
1
‐
2
Features
z
Line
interactive
design.
z
Microprocessor
control
guarantees
high
reliability.
z
Frequency
50Hz/60Hz
auto
sensing.
z
Equipped
with
2
steps
boost
and
1
step
buck
AVR
to
stabilize
Utility
voltage.
z
Built
‐
in
DC
start
function
enable
UPS
to
be
started
up
without
AC
power
supplied.
z
UPS
green
mode
(Energy
saving
function).
z
Off
mode
charging.
z
Modem
/
phone
line
surge
protection.
z
Over
/
low
voltage,
short
circuit,
lighting,
surge
(option)
protection.
2.
CAUTION
z
The
UPS
contains
voltage
that
is
potentially
hazardous.
Qualified
or
certified
technician
should
proceed
all
repairs
and
maintenance.
z
The
UPS
has
its
own
internal
energy
source
(battery).
The
output
receptacles
may
be
active
even
when
the
UPS
is
not
connected
to
the
Utility.
z
The
UPS
is
suitable
for
computers
and
electronic
equipment
with
substantial
rectifier
or
capacitive
loads,
not
suitable
for
electronic
equipment
with
significant
inductive
loads
such
as
motors
and
fluorescent
lamps.
z
Be
sure
to
operate
within
the
power
rating
of
the
UPS.
Below
1/2
or
1/3
of
the
rated
power
is
recommended
for
longer
backup
time
and
longer
battery
life.
z
Do
not
place
the
UPS
near
excessive
humidity,
under
sunshine
or
close
to
heat
emitting
sources.
z
If
the
UPS
is
out
of
order,
detach
the
power
cord
and
consult
your
dealer
right
away.
Do
not
remove
cover,
there
is
no
serviceable
part
inside.
z
The
unit
should
be
supplied
by
a
grounded
source.
Do
not
operate
the
unit
without
a
ground
source.
z
The
socket
should
be
installed
near
the
equipment
and
be
easily
accessible.
z
Do
not
plug
the
UPS
power
cord
into
itself.
That
will
result
in
a
safety
hazard.
z
A
qualified
technician
or
electrician
in
accordance
with
local
electrical
code
should
perform
installation.
3.
INSTALLATION
The
UPS
must
be
installed
in
a
protected
environment
away
from
heat
emitting
appliances
such
as
a
radiator
or
heater.
Do
not
install
this
product
where
excessive
moisture
is
present.
Caution:
Never
connect
a
laser
printer
or
plotter
to
the
UPS.
A
laser
printer
or
plotter
periodically
draws
significantly
more
power
that
its
idle
status,
and
may
overload
the
UPS.
4.
OVERVIEW
5.
OPERATION
z
When
the
UPS
is
connected
to
the
Utility,
but
UPS
is
not
powered
on,
UPS
will
charge
battery
automatically
and
LCD
display
will
show
“UPS
OFF”.
Please
press
main
switch
on
front
panel
for
1
second
to
turn
on
UPS.
z
To
turn
off
UPS
when
UPS
is
under
AC
mode,
please
press
main
switch
on
front
panel
for
4
seconds.
To
turn
off
UPS
when
UPS
is
under
battery
mode,
press
main
switch
and
then
UPS
will
shut
down
completely
in
10
seconds.
