Lincoln Electric INVERTEC 270SX Service Manual page 7

For others machines this function is disabled (the LED is
always OFF).
Welding Mode Switch: With four positions, controls the
welding mode of the machine: three for Stick welding (Soft,
Crisp and User defined) and one for Lift TIG welding.
•
Soft Stick: For a welding with a low spatter
presence. The Auto Adaptive Arc Force is enabled.
•
Crisp Stick: For an aggressive welding, with an
increased Arc stability. The Auto Adaptive Arc Force is
enabled.
•
User defined MMA parameters: with this welding
mode the Auto Adaptive Arc Force is disabled. This
welding mode allows to manually adjust the Hot Start
and the Arc Force as following:
Hot Start: The Output Current initial increment is
adjustable between 0 and 60% of the current set
through the Output Current Knob.
Arc Force: The Output Current temporary
increments are adjustable between 0 and 50% of the
current set through the Output Current Knob.
•
Lift TIG: When the mode switch is in the Lift TIG
position, the stick welding functions are disabled and the
machine is ready for Lift TIG welding. Lift TIG is a
method of starting a TIG weld by first pressing the TIG
torch electrode on the work piece in order to create a
low current short circuit. Then, the electrode is lifted
from the work piece to start the TIG arc.
Meter: The meter displays the preset welding current before
welding and the actual welding current during welding.
Through the Pushbutton on the Display right side, the
Display alternatively shown the output Current (A) or Voltage
(V). The LEDs (A) (V) on top side indicates the measure unit
of the value shown by the Display.
A flashing dot on the Display indicates that the value read is
the average value (V or A) of the previous welding time. This
feature shown the average value for 5seconds after every
welding time.
Other Controls and Features
A. Power Switch: It turns ON / OFF the input power to the
machine.
B. Input cable: Connect it to the mains.
C. Fan: This machine has a F.A.N. (Fan As Needed)
circuitry inside: the fan is automatically turned ON or
OFF. This feature reduces the amount of dirt which can
be drawn inside the machine and reduces power
consumption. When the machine is turned ON the fan
will turn ON. The fan will continue to run whenever the
machine is welding. If the machine doesn't weld for
more than five minutes, the fan will turn OFF.
Maintenance
For any maintenance or repair operations it is recommended
to contact the nearest technical service center or Lincoln
Electric. Maintenance or repairs performed by unauthorized
service centers or personnel will null and void the
manufacturers warranty.
The frequency of the maintenance operations may vary in
accordance with the working environment. Any noticeable
damage should be reported immediately.
•
Check cables and connections integrity. Replace, if
necessary.
•
Regularly clean the torch head, check its consumables
and if necessary replace them.
Refer to the torch instructions before changing or
servicing the torch.
•
Keep clean the machine. Use a soft dry cloth to clean
the enclosing case, especially the airflow inlet / outlet
louvers.
Do not open this machine and do not introduce anything into
its openings. Power supply must be disconnected from the
machine before maintenance and service. After each repair,
perform proper tests to check safety requirements.
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WARNING
WARNING
WARNING