Tweco 130i Transarc Service Manual - Manual (Page 14)

TRANSARC 130i
GENERAL INFORMATION 1-8 Manual 0-5282
1.05 Servicing Hazards
!
WARNING
The symbols shown below are used
throughout this manual to call attention to
and identify possible hazards. When you
see the symbol, watch out, and follow the
related instructions to avoid the hazard.
Only qualified persons should test, main-
tain, and repair this unit.
Only qualified persons should test, main-
tain, and repair this unit.
WARNING
ELECTRIC SHOCK can kill.
• Do not touch live electrical parts.
• Turn Off welding power source and wire feeder
and disconnect and lockout input power using
line disconnect switch, circuit breakers, or by
removing plug from receptacle, or stop engine
before servicing unless the procedure specifi-
cally requires an energized unit.
• Insulate yourself from ground by standing or
working on dry insulating mats big enough to
prevent contact with the ground.
• Do not leave live unit unattended.
• If this procedure requires and energized unit,
have only personnel familiar with and following
standard safety practices do the job.
• When testing a live unit, use the one-hand
method. Do not put both hands inside unit. Keep
one hand free.
• Disconnect input power conductors from de-
energized supply line BEFORE moving a welding
power source.
SIGNIFICANT DC VOLTAGE exists after removal
of input power on inverters.
• Turn Off inverters, disconnect input power, and
discharge input capacitors according to instruc-
tions in Troubleshooting Section before touching
any parts.
WARNING
STATIC (ESD) can damage PC boards.
• Put on grounded wrist strap BEFORE handling
boards or parts.
• Use proper static-proof bags and boxes to store,
move, or ship PC boards.
WARNING
FIRE OR EXPLOSION hazard.
• Do not place unit on, over, or near combustible
surfaces.
• Do not service unit near flammables.
WARNING
FLYING METAL or DIRT can injure eyes.
• Wear safety glasses with side shields or face
shield during servicing.
• Be careful not to short metal tools, parts, or
wires together during testing and servicing.
WARNING
HOT PARTS can cause sever burns.
• Do not touch hot parts bare handed.
• Allow cooling period before working on equip-
ment.
• To handle not parts, use proper tools and/or
wear heavy, insulated welding gloves and cloth-
ing to prevent burns.
WARNING
EXPLODING PARTS can cause injury.
• Failed parts can explode or cause other parts to
explode when power is applied to inverters.
• Always wear a face shield and long sleeves when
servicing inverters.
WARNING
SHOCK HAZARD from testing.
• Turn Off welding power source and wire feeder
or stop engine before making or changing meter
lead connections.
• Use at least one meter lead that has a self-
retaining spring clip such as an alligator clip.
• Read instructions for test equipment.