Lincoln Electric Magnum PRO 250 LX Operator's Manual page 17

MAGNUM PRO 250 LX & LX GT SPOOL GUN
Observe all Safety Guidelines detailed throughout this manual
PROBLEM
(SYMPTOMS)
No arc, wire feed, or gas
flow.
No arc, weak arc.
No wire feed.
Wire feed too fast or too
slow.
Low or no gas flow.
Oxidation of work.
Oxidized work, arc unstable. 1. Wrong welding polarity.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
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.
1. Poor ground connection to work.
2. Power cable connection loose.
3. Voltage set too low.
4. Tip too large for wire size.
5. Wire feed speed too slow.
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 cover binding.
8. Control cable loose.
9. Drive roller worn.
10. Pressure roller stuck.
11. Roller spring loose or broken.
1. Wrong wire speed set for work.
1. Gas flow not set right.
2. Cylinder out of gas.
3. Cylinder valve closed.
4. Leak in gas line.
5. Leak in gun.
6.Gas diffuser clogged
7. Clogged internal valve (only for K3569-2)
RECOMMENDED COURSE OF ACTION
1. Check all power connections.
2. Fix switch or replace.
3. Turn on welder power.
4. Plug in.
5. Inspect and replace
1. Check ground connection.
2. Check connections; if defective, replace cable or
connectors.
3. Adjust to proper voltage
4. Change tip size.
5. Increase wire feed speed.
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. Rotate spool cover slot to proper position.
8. Check all connections.
9. Replace.
10. Replace or lubricate.
11. Replace.
1. Adjust wire feed speed.
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 missing gun
body cover.
6. Blow out gas diffuser openings.
7. Remove neck and check if gas is flowing from
mechanical valve by pressing the trigger. If no gas
flow is detected, adjust first the trigger set screw
as shown in the manual page 13- replace
mechanical valve if no gas is detected.
1. Check polarity.
11
TROUBLESHOOTING