TROUBLESHOOTING | ||
| Observe all Safety Guidelines detailed throughout this manual |
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PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
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| Output Problems |
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Variable or "hunting" arc. | 1. Check for proper size contact. |
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| Make sure the contact tip is not |
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| worn, free of spatter and not melt- |
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| ed. |
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| 2. | Clean and tighten all electrode |
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| and work connections. |
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| 3. | Verify the proper polarity is being |
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| used for the weld procedure. |
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| 4. | Make sure the proper electrode |
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| 5. | Check the gas flow rate and mix- |
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| ture. |
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| 6. | Verify the gun bushing is tightly |
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| mounted to the wire drive. |
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| 7. | Verify the gun is tightly mounted |
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| to the gun bushing. |
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| 8. | Verify the electrode lead is con- |
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| nected to the proper connection |
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| block on the feed head. |
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| 9. | Inspect the motor for worn brush- |
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| es. |
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The motor overload errors occur. | 1. Check for sharp bends in the gun |
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| liner and conduit. |
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| 2. | Examine the contact tip for wear |
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| and proper size. Replace as nec- |
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| essary. |
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| 3. | Check the gun liner and conduit. |
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| The welding electrode should |
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| slide easily through both. |
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| 4. | Verify the proper gun liner is |
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| installed. |
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| 5. | Reduce the pressure arm setting. |
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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.
AutoDrive™ 4R220
