Servicing Hazards - Thermal Arc 201 TS Service Manual

SAFETY INSTRUCTIONS AND WARNINGS

1.05 Servicing Hazards

!
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, maintain, and repair
this unit.
Only qualified persons should test, maintain, and repair
this unit.
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 specifically 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 person-
nel 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 instructions in Troubleshooting Section
before touching any parts.
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.
FIRE OR EXPLOSION hazard.
• Do not place unit on, over, or near combustible surfaces.
• Do not service unit near flammables.
Manual 0-5148
WARNING
WARNING
WARNING
WARNING
THERMAL ARC 161STL, 201TS
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.
HOT PARTS can cause sever burns.
• Do not touch hot parts bare handed.
• Allow cooling period before working on equipment.
• To handle not parts, use proper tools and/or wear heavy, insu-
lated welding gloves and clothing to prevent burns.
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.
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.
FALLING UNIT can cause injury.
• Use lifting eye to lift unit only, NOT running gear, gas cylinders,
or any other accessories.
• Use equipment of adequate capacity to lift and support unit.
• If using lift forks to move unit, be sure forks are long enough
to extend beyond opposite side of unit.
MOVING PARTS can cause injury,
• Keep away from moving parts such as fans.
• Keep away from pinch points such as drive rolls.
1-7
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
Safety Instructions and Warnings