| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual | |||||
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| PROBLEMS |
| POSSIBLE |
| RECOMMENDED |
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| (SYMPTOMS) |
| CAUSE |
| COURSE OF ACTION |
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| PROBLEMS |
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No wire feed occurs when trigger is | 1. | Machine is switched off or unplugged. | 1. | Switch on or plug in machine. |
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pulled | 2. | Out of wire. | 2. | Install full spool of specified wire. |
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| 3. | Contact tip burnback. | 3. | Replace contact tip. |
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| 4. | Fully or partially blocked gun liner | 4. | Remove and clean or replace gun |
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| liner, (See Maintenance Section). |
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| 5. | Bird nest. | 5. | Cut out bird nest, reload wire, and |
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| check for proper wire alignment. |
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| 6. | Defective trigger (contacts open or | 6. | Replace trigger (See Maintenance |
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| dirty). |
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| 7. | Defective trigger circuit in gun. | 7. | Disconnect gun from machine and |
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| check trigger circuit for continuity. |
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| 8. | No motor voltage or current from | 8. | See Troubleshooting section in weld- |
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| machine. |
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| tion manual. |
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| 9. | Contact tip size too small for wire | 9. | Replace contact tip with one that is the |
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| diameter used. |
| correct size. |
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Sluggish wire feed when trigger is pulled | 1. | Drive roll is worn or galled. | 1. | Clean drive roll or replace drive roll. |
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| 2. | Machineʼs wire feed speed setting is | 2. | Increase wire feed speed. |
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| too low. |
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| 3. | Wire is obstructed somewhere along | 3. | Check for obstructions: remove any |
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| the wire feed path in the gun. |
| wire shavings; remove kinked wire; |
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| remove and clean or replace gun tube |
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| liner (See Maintenance Section ). |
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| 4. | Low motor voltage. | 4. | See Troubleshooting section in weld- |
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| ing machineʼs instruction manual. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.