JESS WELDING conMIG 300, Руководство по эксплуатации

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EN - 20
BA-0001 • 2020-12-01
13 Troubleshooting conMIG 300
Display
T°C - int - e.g. +56 • Ambient temperature is below −10°C or
above +40°C
• Return the machine to the normal
temperature range
• Thermal sensor in the control box is
defective
• Replace the control box, have the sensor
repaired
Main switch ‘ON’ on the MC
control box does not work • One or more supply phases have stopped
working
• Check the mains supply cable and fuse
• Fuse for the primary control transformer is
faulty
• Replace 2 AT fuse
• Fuse in the MC control box is defective • Remove and open the control box, replace
6.3 AT fuse
No function when pressing the torch
trigger • Torch trigger is defective • Repair the torch trigger
• Torch control line interrupted • Check the torch control line
• MC control box is defective • Replace the control box; have the control
box tested
Wire feeder motor is not running • MC control box is defective • Replace the control box; have the control
box tested
• Wire feed motor is defective • Wire feed motor is defective, check the
contact poles (carbon contacts)
• Cable connection between the control box
and motor interrupted
• Check the cable connection
The wire between the wire feed
roller and the wire guide roller
buckles • Contact pressure of the wire feed rollers is
too high
• See 10 Wire feeder on page EN - 17
• The distance between the wire feed roller
and the guide tube is too great
• Check the distance/re-adjust the wire guide
tube
Irregular wire feed • Poor uncoiling of the wire from the wire
spool
• Check/re-insert the wire coil
• Wire-holding arbor does not run smoothly • Check the wire-holding arbor
• Incorrect wire feed roller • See 10 Wire feeder on page EN - 17
• Wire guide tube or wire guide spiral is
soiled/defective
• See 10 Wire feeder on page EN - 17
• Contact tip blocked/defective • Clean/replace the contact tip
• Welding wire dirty/starting to rust • Replace the welding wire
• Wire guide tube is not aligned with the
groove of the wire feed roller
• See 10 Wire feeder on page EN - 17
Porous weld seam • Surface of workpiece is soiled (dye, rust,
oil, grease)
• Clean the surface
• No shielding gas (solenoid valve does not
open)
• Check/replace the solenoid valve, check
the gas cylinder
• Insufficient shielding gas • Check the shielding gas volume with the
pressure reducer
• Use a gas measuring tube to check the gas
duct for gas loss
• Gas nozzle is soiled • Clean the gas nozzle
Wire burns back into the contact tip
at the start of welding • Defective wire feed; wire feed rollers
slipping
• See 10 Wire feeder on page EN - 17
Tab. 6 Troubleshooting
Fault/error Possible cause Troubleshooting