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SECTION
1
-
SAFETY
PRECAUTIONS
AND
SIGNAL WORDS
1-1.
GENERAL
INFORMATION
AND SAFETY
This
manual
provides
theory
of
operation
along
with
specific
operating,
testing, and
troubleshooting
proce-
dures.
It
also includes
precautionary information
rele-
vant
to
these
procedures.
This
manual
can
be an
effec
-
tive tool
in
the
hands
of
a
trained
serviceperson.
How-
ever,
it
does
not
and
cannot
take
the
place
of
previous
training
nor
safety-conscious service
work.
If
any
doubt
arises
about
the
specific
application
of procedures
pre
-
sented,
or
if
problems
arise
which
are
not
covered
in this
manual,
contact
the
factory
Service Department
before
proceeding
further.
1-2.
SAFETY
ALERT
SYMBOL AND
SIGNAL
WORDS
The
following safety alert
symbol
and signal
words
are
used
throughout
this
manual to
call
attention
to and
identify
different
levels of
hazard
and
special
instruc
-
tions.
This safety alert
symbol
is
used
with
the
signal
A
words
WARNING and
CAUTION
to
call
atten
-
tio
n
to
the
safety
statements.
A
WARNING statements identify
procedures
or
practices which
must
be
followed
to
avoid
seri
-
ous personal injury
or loss of
life.
CAUTION
statements identify procedures
or
A
practices which
must
be
followed
to
avoid
minor
personal injury
or
damage
to
this
equipment.
IMPORTANT
statements identify special
instructions
necessary
for
the
most efficient
operation
of
this
equip
-
ment.
1-3.
SAFETY
PRECAUTIONS
A
W
ARNING: ELECTRIC
SHOCK
can kill.
S
Do
not
touch
live
electrical
parts.
•
Protect
yourself
with
dry
insulating
gloves
and
clothing.
•
Insulate
yourself
from
ground
by
using
rubber9loves
and
insulating
floormats
when
power is
applied
to
the
unit.
•
Shut
down
unit
and
disconnect
input
power
when
servicing
unless
the
procedure
specifi
-
cally
requires
an
energized
unit.
•
Do
not
leave
live
unit
unattended.
ARC
RAYS,
SPARKS,
AND HOT
SURFACES
can
burn eyes
and
skin; NOISE
can
damage
hearing.
•
Wear
correct
eye,
ear,
and body
protection.
FUMES
AND
GASES can
seriously
harm
your
health.
•
Keep
your
head out
of
the
fumes.
•
Ventilate to
keep
from
breathing
fumes
and
gases.
•
If
ventilation
is
inadequate,
use
approved
breathing
device.
•
Read Material
Safety
Data
Sheets
(MSDSs)
and
manufacturer’s
instructions
for
any
materials
used.
WELDING
WIRE
can
cause
puncture
wounds.
•
Do
not
point
gun towa
rd
any
part of
the
body,
any
conductive
surface,
or
other
personnel.
HOT
METAL,
SPATrER,
AND
SLAG
can
cause
fire
and
burns.
•
Watch
for
fire.
•
Have
a
fire
extinguisher
nearby
and
know
how
to
use
it.
•
Do
not
use
near
flammable
material.
•
Allow
work
and
equipment
to
cool
before
handling.
MOVING
PARTS
can
cause
serious
injury.
•
Keep
away
from
moving
parts.
HOT
SURFACES
can
cause
severe
burns.
•
Allow
cooling
period
before
servicing.
MAGNETIC
FIELDS
FROM
HIGH CURRENTS
can
affect
pacemaker
operation.
•
Wearers
should
consult
their
doctor
before
going near
the
servicing
of
arc
welding
equip
-
ment
or
any
arc
welding
operations.
5-21E
TM-1571
Page
1