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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 | |
| mally. The auxiliary output remains | machine will normally lose |
| Adjustment rheostat for resis- | |||||
| constant. The engine is operating | some output as the components |
| tance | and proper operation. | ||||
| correctly. | get heated. |
| Normal resistance is 64 ohms. | |||||
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| 2. Check for loose, worn, dirty, or |
| Check | associated wires for | ||||
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| loose | or | faulty connections. | ||||
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| poorly seated DC generator |
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| See the Wiring Diagram. | ||||||
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| brushes. |
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| 3. The armature commutator may | 2. | Perform | the | Field | Shunt | ||
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| Winding 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 for | ||||||
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| ing cables. |
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| 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
