Lincoln Electric INVERTEC 175TP Service Manual page 5

1. If the electrode points to the welding piece it provokes
the short-circuit between the piece and the electrode.
2. Pressing the torch key the pre gas is set. The end of the
pre gas is indicated by a long BEEP. If that operation is
carried out starting from the post gas you get the long
BEEP immediately as soon as you press the torch key.
3. During the BEEP it is possible to lift the electrode from
the piece provoking the arc fuse.
4. Two Times Welding.
Active only in TIG mode.
By pressing the function key 8 - Picture 1 Page 4.) you can
position the luminous indicator on symbol 5 - Picture 1 Page 4.) .
In this mode you press the torch button to prime the welding
current and it should be pressed whilst welding.
5. Four Times Welding.
Active only in TIG mode.
By pressing the function key 8 - Picture 1 Page 4.) you can
position the luminous indicator on symbol 6 - Picture 1 Page 4.) .
In this mode the torch button works in four times for an
automatic weld. The gas flux is activated by first pressing the
torch button. By releasing the button the welding arc is primed.
The second pressing on the torch button interrupts the welding.
By releasing the gas flux is deactivated.
6. Spot Welding.
Active only in TIG mode.
can position the luminous indicator on symbol 7 - Picture 1 Page
4.) . In this mode you obtain a spot welding timed with a set up
timer as described on reference 24 - Spot time.
7. TIG pressed.
Once the TIG mode is selected (Lift or HF), press the function
key 11 - Picture 1 Page 4.) until the luminous indicator reaches
the position on symbol 9 - Picture 1 Page 4) . In this mode the
cur-rent pulsates between a maximum and a minimum value
and can be set up as described on reference 22: Nominal
Current Welding and e 23: Reduced Current respectively.
8. TIG DC.
Once the TIG (Lift or HF) mode is selected press the function
key 11 - Picture 1 Page 4.) until the luminous indicator reaches
the position on symbol 10 - Picture 1 Page 4.) .
9. Remote.
In order to connect the remote control press the function key 14
- Picture 1 Page 4.) until the luminous indicator reaches the
position on symbol 12 - Picture 1 Page 4.) .
10. Local.
In order to connect the remote control press the function key 14
- Picture 1 Page 4.) until the luminous indicator reaches the
position on symbol 13 - Picture 1 Page 4.)
11. Alarm Indicator.
When one of the alarms goes off the indicator 15 - Picture 1
Page 4.) and the display 17 - Picture 1 Page 4.) The alarm, the
relative indications and the instructions to follow to restore the
generator are shown immediately:
DISPLAY MEANING
Insufficient voltage entry, line switch open or lack of line,
–– –– ––
no V regulated.
Interface connector disconnected, absence of the 24V
LtF
auxiliary voltage, other interface problems..
Power converter overheated.
ThA
Restoration occurs when the alarm stops.
Short-circuit caused by:
a) Generator's terminal output in short-circuit.
b) Output stage failure.
SCA
a) Eliminate the short-circuit.
b) Call after-sales service.
PiF The inverter stage does not work properly.
ATTENTION: WHENEVER ALL THE PANEL LUMINOUS INDI-
CATORS REMAIN ON OR OFF SIMULTANEOUSLY FOR
MORE THAN 40 SECONDS IT WILL BE NECESSARY TO
CON-TACT THE MANUFACTURER.
12. Current supply
The indicator 16 - Picture 1 Page 4.) lights up every time the
generator is supplying a current.
13. Led.
Symbols that display the following; Duty Cycle, Frequency,
Time, Amps) 18 - Picture 1 Page 4.)
5.0 WELDING PROCESS PROFILE
In this section of the panel you can set up all the parameters in
or-der to improve the process previously selected.
5.1 FUNCTION KEYS.
Press the function keys 31 o 32 - Picture 1 Page 4.) for at least
a second with the symbols
In order to select the welding parameters that you wish to
modify.
By pressing a function key you select the different welding
modes.
Please note that during every single parameter the
corresponding luminous indicator lights up. The display 17 -
Picture 1 Page 4.) and the led 18 - Picture 1 Page 4.) indicate
the parameter's value and unity measure respectively.
5