Lincoln Electric INVERTEC 175TP Service Manual page 4

7. On the unit preset for coated electrode welding
(Ref.1 - Picture 1 Page 3.).
8. Adjust welding current with ampere selector (Ref. 30 -
Picture 1 Page 3.).
9. Turn on the power source
2.4 CONNECTION AND PREPARATION OF EQUIPMENT
FOR GAS TUNGSTEN ARC WELDING TIG.
• TURN OFF WELDER BEFORE MAKING CONNECTIONS.
Connect all welding accessories securely to prevent power loss.
Carefully follow safety precautions described.
1. Position the welder in TIG LIFT and TIG HF mode.
2. Fit the required electrode and nozzle to the electrode holder
(Check the protrusion and state of the electrode tip).
3. Connect the ground cable quick connection to the positive
(+) receptacle and the clamp near the welding zone.
4. Connect the torch power cable connector to the negative
receptacle. (-) .
5. Connect the gas hose to the regulator located on the gas
cylinder.
6. Regulate the welding mode and the desired parameters
(Section 5.0) .
7. Open the gas valve on the torch.
8. Connection of relay command.
9. When relay command is required connect the relay to the
socket on the front panel. In this position regulation can be
fractioned through the power gauge.
10. Turn ON the power source.
3.0 FUNCTIONS
3.1 FRONT PANEL
Picture 1.
Covered Electrode Welding
1
Indicator (MMA)
TIG DC Welding Indicator
2
with High Freq. Start
TIG DC Welding Indicator with
3
Lift Start
4,8
11 Vertical Function Key
14
Welding Indicator (Two
5
Times)
Welding Indicator (Four
6
Times)
7 Spot Welding Indicator
9 TIG CD Pressed Indicator
10 TIG CD Indicator
12 Remote Control Indicator
13 Remote Control Indicator
15 Alarm Indicator
16 Current Supply Indicator
17 Digital Instrument
4.0 WELDING SET UP
4.1 FUNCTION KEYS.
If you press for at least a second the function
keys On the panel as represented by the symbol.
It is possible to select the desired welding functions. With each
function key pressed you are selecting a welding function.
IMPORTANT: VERTICAL FUNCTION KEYS DO NOT WORK
DURING THE WELDING STAGE.
1. Covered Electrode Welding MMA.
By pressing the function key 4 and taking the luminous indicator
on symbol 1 - Picture 1 Page 4.) you can select the mode of
electrode welding.
2. TIG DC HF Welding.
By pressing the function key 4 - Picture 1 Page 4.) you can
select the mode of TIG welding with high-voltage start until the
luminous indicator reaches the position on symbol 2 - Picture 1
Page 3.) , If you press the torch button you will get a high-
voltage discharge that allows the arc fusing.
3. TIG DC Welding with Lift Start
By pressing the function key 4 - Picture 1 Page 4.) you can
select the mode of TIG welding with lift start until the luminous
indicator reaches the position on symbol 3 - Picture 1 Page 4.) .
In this mode the arc fusing occurs with the following sequence:
4
18 Digital Instrument mode
19 Pre Gas Indicator
Initial Current Indicator (Four
20
Times mode)
21 Ascent Slope Indicator
Nominal Current Welding
22
indicator
Reduced Current Indic. (Four
23
Times mode)
24 Spot Time Indicator
Wave-Shaped Balance
25
indicator
26 Pressed Frequency Indicator
27 Descent Slope Indicator
Final Current Indicator (Four
28
Times mode)
29 Post Gas Indicator
30 Regulation Knob
Left scrolling key/Memorized
31
program recall
Right scrolling key/Storage
32
program