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X8 MIG WELDER 2.5 Troubleshooting
Problem Recommended actions
The gun overheats
Make sure the coolant circulation is working normally (see
the coolant circulation warning LED in the power source).
Measure the coolant circulation speed: detach the coolant
output hose from the wire feeder while the power source
is on, and let the coolant run into a measurement cup. The
circulation must be at least 0.5 l/min.
Make sure that the welding parameters are within the range
of the welding gun and the neck. The gun and the neck have
separate limits for the maximum current; the lower one of
these is the maximum current that can be used.
The welding gun connector overheats
Make sure the connector is properly connected to the wire
feeder.
Make sure the current transfer surface and the connector pins
of the gun connector are clean and undamaged.
The gun vibrates too much during
welding
Check the tightness of the contact tip adapter and contact
tip.
Check the motor current.
Check the wire liner.
Check the filler wire. It must be straight and start coiling
when it comes out from the contact tip. If not, check the
tightness of the feeding rolls.
Gun remote control displays a warning/
error symbol
Check the Control Pad or Wire feeder control panel to see more
information about the error. For more information, see Error
codes on page 170.
Table 10: Quality of welds
Problem Recommended actions
Dirty and/or poor quality weld
Check that the shielding gas has not run out.
Check that the shielding gas flow is unobstructed.
Check that the gas type is correct for the application.
Check the polarity of the gun/electrode.
Check that the welding procedure is correct for the
application.
Varying welding performance
Check that the wire feed mechanism is adjusted properly.
Blow compressed air through the wire liner to check that it is
not blocked.
Check that the wire liner is correct for the selected wire size
and type.
Check the welding gun contact tip's size, type and wear.
Check that the welding gun is not overheating.
Check that the earth return clamp is properly attached to a
clean surface of the workpiece.
OPERATING MANUAL | EN 169
©
KEMPPI | 2018-09-28
169


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