Lincoln Electric IM408 MAGNUM SG SPOOL GUN - Manual (Page 21)

Troubleshooting Guide
PROBLEM
No arc, wire feed, or gas flow.
No arc, weak arc.
No wire feed.
Wire feed too fast or too slow.
Wire feed rollers go backward.
Low or no gas flow. Oxidation
of work.
Oxidized work, arc unstable.
Gas cone wobbles.
Contact tip extension.
SYMPTOMS
1. Cable connections loose.
2. Trigger switch loose or defective.
3. Welder not turned on.
4. Welder not plugged in.
5. Cable or adapter cable damaged.
6. Adapter (if used) not connected.
1. Poor ground connection to work.
2. Power cable connection loose.
3. Voltage set too low.
4. Tip too large for wire size.
1. Feeding small diameter wire with
large groove on drive roller.
2. Wire drive release open.
3. Wire welded to tip.
4. Wire spool empty.
5. Tip too small for wire.
6. Kink or bend in wire.
7. Spool tension too tight.
8. Spool cover binding.
9. Control cable loose.
10. Drive roller worn.
11. Pressure roller stuck.
12. Roller spring loose or broken.
1. Wrong wire speed set for work.
1. Electrical connections reversed in
adapter cable (or wires).
1. Gas flow not set right.
2. Cylinder out of gas.
3. Cylinder valve closed.
4. Leak in gas line.
5. Leak in gun.
1. Wrong welding polarity.
1. Insulator loose.
1. Gas cone positioned incorrectly.
REMEDY
1. Check all power connections.
2. Fix switch or replace.
3. Turn on welder power.
4. Plug in.
5. Inspect and replace.
6. Connect adapter.
1. Check ground connection.
2. Check connections; if defective, replace
cable or connectors.
3. Adjust to proper voltage.
4. Change tip size.
1. Change position of wire drive roller.
2. Close wire drive release.
3. Peel wire off tip or use new tip.
4. Insert new spool.
5. Insert correct tip.
6. Pull wire through tip or start new wire
end.
7. Loosen spool tension nut.
8. Rotate spool cover slot to proper position.
9. Check all connections.
10. Replace.
11. Replace or lubricate.
12. Replace.
1. Adjust wire feed speed at welder’s con-
trol panel, or at remote wire speed control
in spool gun handle (where applicable).
1. Check all gun (and adapter) cable connec-
tions.
1. Set proper flow rate.
2. Get new cylinder of gas.
3. Open cylinder valve.
4. Inspect and replace.
5. Check for missing gun tubes and/or miss-
ing gun body cover.
1. Check polarity.
1. Tighten insulator, but not enough to dam-
age threads.
1. Slide gas cone in or out to position need-
ed for work.
14