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| TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | ||||
| 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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| OUTPUT PROBLEMS |
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| The welding output varies abnor- | 1. May be a normal condition. The | 1. Check the Fine Current Adjust- | ||||
| mally. The auxiliary output remains | machine will normally lose | ment rheostat for resistance | ||||
| constant. The engine is operating | some output as the components | and proper operation. | Normal | |||
| correctly. | get heated. | resistance is 64 ohms. Check | ||||
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| 2. Check for loose, worn, dirty, or | associated wires for | loose | or | ||
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| faulty connections. | See | the | |||
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| poorly seated DC generator | |||||
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| Wiring Diagram. |
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| brushes. |
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| 3. The armature commutator may | 2. Perform the Shunt Field Wind- | ||||
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| ing Test. |
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| need cleaned. |
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| 4. Check for loose or faulty weld- | 3. Check | the Current | Range | ||
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| Selector | Switch and | contacts | |||
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| ing cables. | |||||
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| for proper operation. |
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| 4. While the machine is loaded, | ||||
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| check the interpole and series | ||||
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| coils for signs of “arcing.” This | ||||
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| condition would point to shorted | ||||
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| turns in the “arcing” coil. |
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| 5. The main armature may be | ||||
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| faulty. Check for grounds. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
