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TROUBLESHOOTING & REPAIR |
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TROUBLESHOOTING GUIDE |
| Observe Safety Guidelines | |||
| detailed in the beginning of this manual. | ||||
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |||
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | |||
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| OUTPUT PROBLEMS |
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The engine starts and runs at the | 1. Check the welding cables for | 1. Check the fine current control | |||
correct speed but there is no, or | loose or faulty connections. | field rheostat for resistance and | |||
very low, welder output. The DC | 2. Check for loose or missing | proper operation. Normal resis- | |||
auxiliary output voltage is normal. | tance is 64 ohms. Check asso- | ||||
brushes in the welding genera- | |||||
| ciated wires for loose or faulty | ||||
| tor. | ||||
| connections. | See the Wiring | |||
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| Diagram. |
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| 2. Perform the Main Generator | |||
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| Shunt Field Winding Test. | |||
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| 3. Check the continuity of the inter- | |||
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| pole coils. They should show | |||
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| continuity from the positive | |||
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| brusholders to the positive out- | |||
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| put terminal and should NOT be | |||
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| grounded to | the generator | ||
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| frame. |
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| 4. Check the continuity of the | |||
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| series coils. They should show | |||
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| continuity from the negative | |||
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| brusholders, through the current | |||
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| selector switch, to the negative | |||
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| output terminal and should NOT | |||
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| be grounded to the generator | |||
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| frame. |
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| 5. The main armature may be | |||
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| faulty. Check for grounds and/ | |||
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| or shorts. |
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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
