Safety Precautions
OM1305066E26
4
1.
Safety Precautions
Please read the “Safety manual” (separate volume) for detail safe handling.
In case of using the product in a system, please also read the operating instructions of peripheral equipment.
Signal Words and Safety Symbols
1.1 Observe the following for safe welding operation
Welding Power Unit
(1) Never use the welding power unit for other than weld-
ing purpose, such as for pipe thawing.
(2) It is very important to comply with all instructions,
safety warnings, cautions and notes mentioned. Fail-
ure to do so can result in serious injury or even death.
(3) Work of driving source at the input side, selecting work
site, handling, storage and piping of high pressure gas,
storage of welded products and also disposal of waste
should be performed according to the operating
instructions and national, state and local codes and
regulations.
(4) Prevent any unauthorized personnel to enter in and
around the welding work area.
(5) Only educated and/or skilled persons who well under-
stand this welding power unit should install, operate,
maintain and repair the unit.
(6) Only educated and/or skilled persons who well under-
stand the operating instructions of the unit and who are
capable of safe handling should perform operation of
the unit.
Against Electric Shock
(1) Only educated and/or skilled persons should perform
grounding of the case of the welding power unit, the
base metal and jigs electrically connected to the base
metal.
(2) Before installation or maintenance work, turn off all
input power including power at the power distribution
box and wait for at least five minutes to discharge elec-
trical current from the capacitors. Check to make sure
that no charged voltage present at capacitors before
touching any parts.
(3) Do not use undersized, worn, damaged or bare wired
cables.
(4) Connect cables firm and insulate the connected parts.
(5) Do not use the product with a case and panel removed
or not in place.
(6) Do not handle the welding power unit with torn or wet
gloves.
(7) Wear safety harness in case of working above floor
level.
(8) Perform periodic checks without fail. Repair or replace
any damaged parts as needed prior to use.
(9) Turn off all equipment when not in use.
(10) Do not touch any live parts.
(11) The welding power unit must be grounded and the
work must be grounded in accordance with ANSI
Z49.1 (For North America).
Electromagnetic Wave
(1) Electromagnetic wave generated during welding oper-
ation may have adverse affects on medical equipment
in the periphery of the equipment in operation and the
welding work site. If you wear a pacemaker, consult
your physician before going near the welding work site.
(2) Provide proper grounding work of all equipment includ-
ing electronic devices and safety devices near the
welding work site. Conduct an additional electromag-
netic shielding work if needed.
(3) Lay the welding cable as short as and as close to the
floor or ground as possible. Lay the base metal cable
and the torch cable along to each other to reduce gen-
eration of electromagnetic wave.
(4) Never share the ground work of the base metal and
welding power unit with other equipment.
Signal Words
Safety Symbols
Indicates a potentially hazardous
situation, which, if not avoided, could
result in death or serious injury.
Indicates a prohibited
action.
Indicates a potentially hazardous
situation, which, if not avoided, could
result in minor injury or property
damage.
Indicates a mandatory
action.
Indicates a hazard
alert.
WARNING
CAUTION
WARNING
Observe the following cautions to pre-
vent accidents that can cause serious
injuries.
Observe the following instructions to
prevent the hazard.
Observe the following cautions to pre-
vent radio interference due to welding
current and high frequency for arc start.
