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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 |
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(SYMPTOMS) |
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| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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No welding output in all modes. |
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| 5. Perform the Stator Voltage | |||||||||
The engine operates normally. The |
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| Test. |
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auxiliary output is normal. |
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| 6. | Perform the Output Rectifier | |||||||
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(continued) |
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| Bridge Test. |
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| 7. Perform the Power Module | ||||||
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| Test. |
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| 8. Perform the Analog Power | ||||||
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| Board Test. |
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| 9. Check | the | output control | ||||
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| potentiometer | and | associated | |||
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| wiring. |
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| 10. The Control Board may be | ||||||
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| faulty. |
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No welding output in all modes. | 1. Check the brushes for wear and | 1. | Perform the Rotor Resistance | |||||||||||
Also no | auxiliary | power. | The |
| proper contact to the rotor slip |
| Test. |
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engine | operates | normally | at |
| rings. |
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| 2. | Perform the | Flashing | and | |||
approximately 3700 RPM. |
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| 2. | Make sure the engine is operat- |
| Rotor | Voltage Test. | If the | ||||||||
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| ing at the correct high idle |
| “flashing” voltage is not present, | |||||||
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| speed (3700 RPM). |
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| the battery board or leads #201 | ||||||
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| 3. | Check for loose or faulty con- |
| or #200 may be faulty. See the | |||||||
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| Wiring | Diagram. | Also, | make | ||||||
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| nections or leads at the auxiliary |
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| sure that lead #5H has continu- | ||||||||
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| output | receptacles and/or | the |
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| ity (zero ohms) to ground. | ||||||||
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| welder | output terminals. | See |
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| the Wiring Diagram. |
| 3. | Check the field diode and | ||||||
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| capacitor. Replace if neces- | |||||
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| sary. |
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| 4. | Perform the Stator Voltage | |||||
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| 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, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
