16
SC900
Power
Switch/Power
On
The
power
switch
for
the
SC900
is
located
on
the
left
front
of
the
front
control
panel.
Turn
the
red
dial
clockwise
to
the
horizontal
position
(
I
)
indicator
to
turn
the
unit
ON.
Turn
the
dial
to
the
ver
‐
tical
position
(
O
)
indicator
to
turn
the
unit
OFF.
When
the
welder
is
turned
on,
the
digital
display
will
go
through
a
self
‐
diagnostic
check.
This
takes
approximately
3
to
5
seconds,
and
then
the
digital
display
will
show
the
last
time
and
current
to
which
the
unit
was
set.
This
denotes
that
the
unit
is
ready
to
go.
When
connected
to
the
welder,
the
stud
gun
will
actuate
3
times,
indicating
that
there
is
a
good
connection.
SC900
Diagnostic
Lights
On
the
Control
Panel,
located
below
the
digital
display,
is
a
row
of
diagnostic
lights
for
the
welder.
OUTPUT
‐
When
the
stud
gun
is
triggered,
this
light
comes
on
to
indicate
that
the
OCV
is
present
at
the
output
terminals.
TRIGGER
‐
When
the
stud
gun
is
triggered,
this
light
comes
on
to
indicate
that
the
trigger
circuit
is
functioning
properly,
and
that
the
welding
unit
is
receiving
feedback
from
the
stud
gun.
POWER
‐
When
this
light
is
lit,
it
indicates
that
there
is
an
error.
TEMP
‐
When
this
light
is
lit,
it
indicates
that
either
the
main
transformer
or
weld
bridge
has
reached
maximum
temperature
and
that
the
unit
will
not
function
until
it
is
cooled.
REMOTE
‐
This
function
is
not
currently
in
use.
SC900
Operations
‐
Settings
