Troubleshooting – Kemppi ARC800 User Manual

Page 11

The adjustment value of the gouging current is shown on the display when you turn the

control knob. The adjustment value is shown at the accuracy of 1 A. The indicator light A is

shown on the display. The values you use are stored in the control panel memory and will be

used when you start the machine again.

3.4.2 actual gouging current and voltage display

While gouging, the control panel display shows the actual current and voltage values. The

gouging current is shown in amperes at the accuracy of 1 A, while the voltage is shown in

volts at the accuracy of 0.1 V.

3.4.3 restoring factory settings

The control panel of the gouging power source has only one setting that the user can modify:

restore factory settings. This allows the user to restore the original welding current value and

clear the memory.
To restore the factory settings, do this:

Keep the Setup button in the control panel pressed for at least 5 seconds. The display

will read Set Up.

Release the Setup button. The display will read FAC OFF.

Turn the control knob until the display reads FAC ALL.

Briefly press the Setup button in the control panel to perform factory reset.

3.5

teChniques FOr CarbOn-arC GOuGinG

In practical carbon-arc gouging, note the following:

• Before you start working, make sure that the equipment is ready to use and that the

gouging current and the carbon have been selected according to the work piece.

• The pressure of the compressed air required in carbon-arc gouging is 500 – 700 kPa

(5 – 7 bar).

• Attach the gouging carbon (maximum size ø 13 mm) to the holder in such a way that the

free length of the carbon is 100 – 150 mm.

• Open the compressed air valve and take the tip of the carbon to the work piece.

• Ignite the arc by scratching the work piece with the gouging carbon.

• Move the gouging carbon in such a position that the compressed air flow hits the

molten material between the gouging carbon and the groove created.

• A suitable angle for gouging carbon is 20° – 45°. If the angle is greater, compressed air

cannot blow the molten metal away.

• Note that a gouged surface is not immediately ready for welding. Before welding, the

surface must be cleaned by grinding, for example.

NOTE!

You must not exceed the maximum current specified for a gouging carbon as it will

accelerate carbon wear. the gouging current is too high if the copper coating melts faster than the

gouging carbon.

trOubleshOOtinG

In the event of a failure of the machine, contact an authorised Kemppi service agent. Before

taking your unit for servicing, check the list below.

4.1

OverlOad (yellOw indiCatOr lit)

Two simultaneously operating fans cool both power sources of the machine. The machine

may, however, overheat if continuously loaded above the rated values or if the circulation of

cooling air is prevented.
The yellow indicator A4 is lit in the event of overheating. You then must stop gouging and let

the machine cool down. The indicator light turns off when gouging can be resumed.

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