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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The wire feeder does not feed wire | 1. Verify the power source is turned |
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and the drive rolls do not spin. |
| on. |
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| 2. | Verify the circuit breaker for the |
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| wire feeder on the power source |
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| has not tripped. |
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| 3. | Verify power is being supplied to |
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| the wire feeder. |
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The wire feeds erratically. | 1. Verify the correct drive rolls and |
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| inner wire guide are installed in |
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| the wire drive. |
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| 2. | Check for sharp bends in the gun |
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| liner or conduit. |
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| 3. | 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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| 4. | 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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| 5. | Verify the proper gun liner is |
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| installed. |
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| 6. Verify the pressure arms are set |
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| properly. Too much pressure may |
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| crush the wire. |
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| 7. | Inspect the motor for worn brush- |
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| es. |
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No shielding gas | 1. Verify the gas supply is turned on |
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Variable or "hunting" arc. |
| and not empty. |
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| 2. | Check the gas hose for cuts. |
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| Make sure it is not crushed. |
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| 3. | Verify the shielding gas hose is |
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| connected to the gun bushing or |
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| welding gun. |
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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
