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| TROUBLESHOOTING AND REPAIR |
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Troubleshooting Guide – See Wiring Diagrams for location of specified |
| Observe Safety Guidelines | ||||||
components and 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 PROBLEMS |
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Rough wire feeding or the wire will | 1. The gun cable may be kinked or |
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not feed but the drive rolls are turn- | twisted. |
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ing. |
| 2. Check the drive roll tension and |
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| the position of the grooves. |
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| 3. Electrode may be rusted or dirty. |
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| 4. The contact tip may be damaged |
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| or not the correct size. |
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| 5. Check the wire spindle for ease of |
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| rotation. |
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| 6. Make certain the gun is pushed all |
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| the way into the gun mount and |
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| properly seated. |
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No control of wire feed speed. | 1. The wire feed speed control may |
| 1. The wire speed control potentiometer | |||||
Other machine functions are nor- | be dirty. Rotate several times and |
| may be | faulty. | Check or | replace. | ||
mal. |
| check if the problem is resolved. |
| Normal | potentiometer resistance is | |||
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| 10K ohms. |
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| 2. Perform the Wire Drive Motor and | |||
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| Tachometer Feedback Test. | |||
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| 3. The control board may be faulty. | |||
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There is no wire feed when the gun | 1. Check for adequate wire supply. |
| 1. Perform the Wire Drive Motor and | |||||
trigger is activated. | Normal open |
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| Tachometer Feedback Test. | ||||
circuit weld voltage is present and | 2. If the drive rolls are turning, check |
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the gas solenoid functions normally. | for a mechanical restriction in the |
| 2. The wire speed control potentiometer | |||||
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| wire feed path. |
| may be | faulty. | Check or | replace. |
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| Normal | potentiometer resistance is | ||
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| 3. The gun liner may be clogged. |
| 10K ohms. |
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| Check or replace. |
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| 3. The control board may be faulty. | |||
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| 4. If the drive rolls are not turning |
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| when the gun trigger is activated, |
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| contact your local Lincoln Electric |
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| Authorized Field Service Facility. |
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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
