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TROUBLESHOOTING & REPAIR |
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TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||
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| 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 DC receptacle and | 1. | Check for loose or faulty con- | ||
correct speed, but there is no DC |
| plug for loose or faulty connec- |
| nections or wires at the 115 | ||
auxiliary output voltage at the |
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| VDC receptacle and associated | |
115VDC receptacle. The welding |
| 2. Check the 15 Amp fuse. CSA |
| circuitry. | See the Wiring | |
generator is functioning correctly. |
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| Diagram. |
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| machines only. |
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The actual welding current is much |
| 1. Check the welding cables for | 1. | The engine RPM may be low. If | ||
less than is indicated on the dials. |
| loose or faulty connections. |
| necessary perform the Engine | ||
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| 2. The welding cables may be |
| Throttle Adjustment Test. | ||
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| excessively long or coiled. | 2. | Perform the DC Exciter Test. | ||
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| 3. Check the main DC generator | 3. | Check the fine current control | ||
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| brushes for good commutation |
| field rheostat for resistance and | ||
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| and alignment. | Contact the |
| proper operation. Normal resis- | |
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| Lincoln Electric | Service Dept. |
| tance is 64 ohms. Check asso- | |
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| ciated wires for loose or faulty | |||
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| connections. | See the Wiring |
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| Diagram. |
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| 4. | Check the current range selec- | |
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| tor switch and contacts for prop- | |
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| er operation. |
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| 5. | Perform the | Main Generator |
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| Shunt Field Winding Test. | |
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| 6. | 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
