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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE |
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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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| No weld output and no auxiliary | 1. The generator brushes may be | 1. Perform the Rotor Voltage Test. |
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| output - engine runs normally. | worn or faulty. See the Main- | 2. If the rotor voltage is zero to 3 |
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| tenance section of this manual |
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| VDC, check the flywheel alter- |
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| or contact your local Lincoln |
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| nator and | associated wires |
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| Electric Authorized Field Ser- |
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| 200A, 202, and 202A for conti- |
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| vice Facility. |
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| nuity. The voltage from lead |
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| 200A to ground should be at |
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| least 18 to 21 VDC at high idle |
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| (3700 RPM). Normal voltage is |
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| 46 VDC. If the voltage is low or |
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| missing, the flywheel alternator |
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| may be faulty. See the wiring |
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| diagram. |
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| 3. Check lead 201B (green) for |
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| continuity | (zero ohms) to |
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| ground. See wiring diagram. |
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| 4. The field capacitor (C1) or |
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| bridge (D1) may be faulty. Test |
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| or replace. |
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| 5. Test the rheostat (R1). Normal |
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| resistance is 3.3 ohms. See the |
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| Rheostst Replacement drawing. |
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| 6. The rotor may be faulty. Per- |
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| form the Rotor Resistance Test. |
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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