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| TROUBLESHOOTING AND REPAIR | |||
Troubleshooting Guide – See Wiring Diagrams for location of specified | Observe Safety Guidelines | |||
components. See Wiring Diagrams for troubleshooting of specific circuits. | detailed in the beginning of this manual. | |||
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PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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WIRE FEEDING AND WELDING PROBLEMS (Continued)
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The wire feeds but starts and stops intermittently.
1.The gun trigger may be faulty. Check or replace.
2.Check for mechanical restrictions in the wire feed path.
1.The drive motor brushes may be faulty. Check and replace if less than 1/4 in. in length.
2.The wire feed speed potentiometer may be faulty. Check the resistance of the potentiometer over the entire range of travel. The potentio- meter should adjust from 0 to 10K Ohms. If adjustment is not smooth and linear, replace per Wire Feed Speed Potentio- meter Replacement procedure.
3.The Control PC Board may be faulty. Replace.
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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 the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call
