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X8 MIG WELDER 2.5 Troubleshooting
Problem Recommended actions
The gun overheats
Make sure the gun's neck is correctly connected to the
handle: push the neck deep enough and check that the neck
tightener is properly tightened.
Make sure that the contact tip adapter is properly hand-
tightened and the contact tip properly attached to it.
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 gun neck overheats
Make sure you are using original Kemppi consumable and
spare parts. Incorrect spare part materials may cause the
overheating of the neck.
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 9: Water-cooled welding guns
Problem Recommended actions
The wire burns into the contact tip
Make sure the size and type of the current tip and wire liner
are suitable for the filler wire.
Make sure the wire liner is clean.
Make sure the wire liner does not make any steep loops.
Check the motor current level. If the current is too high, there
may be problems in the wire liner.
Check the tightness of the feeding rolls. Too tight feeding
rolls may affect soft filler wires, such as aluminium and flux-
cored wires.
OPERATING MANUAL | EN 168
©
KEMPPI | 2018-09-28
168


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