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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
Rough wire feeding or the wire will 1. The gun cable may be kinked or not feed but the drive rolls are turn- twisted.
ing.
2.Check the drive roll tension and the position of the grooves.
3.Electrode may be rusted or dirty.
4.The contact tip may be damaged or not the correct size.
5.Check the wire spindle for ease of rotation.
6.Make certain the gun is pushed all the way into the gun mount and properly seated.
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 |
| may be | faulty. | Check or replace. |
mal. |
| and check if the problem is |
| Normal | potentiometer resistance is | |
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| resolved. |
| 10K ohms. |
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| 2. | Perform the Wire Drive Motor and | ||
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| Wire Speed Potentiometer 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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| Wire Speed Potentiometer Test. | ||
circuit weld voltage is present and | 2. | If the drive rolls are turning, |
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the gas solenoid functions normally. |
| check for a mechanical restriction | 2. | The wire speed control potentiometer | ||
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| in the wire feed path. |
| may be | faulty. | Check or replace. |
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| Normal | potentiometer resistance is | |
| 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. | ||
| 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
