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TROUBLESHOOTING & REPAIR
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE |
| Observe Safety Guidelines | |||
| 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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| ENGINE PROBLEMS |
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The welding arc is “cold.” The | 1. Check for loose or faulty con- | 1. With the output control at max- | |||
engine runs normally. The auxiliary | nections at the weld output ter- | imum, check for the correct | |||
power functions normally. | minals and welding cable con- | open circuit voltage (OCV) at | |||
| nections. | the welder output terminals (75 | |||
| 2. The welding cable may be too | - 82 VDC). If the correct open | |||
| circuit voltage is present at the | ||||
| long or coiled, causing an | ||||
| output | terminals, | check | for | |
| excessive voltage drop. | ||||
| loose connections on the heavy | ||||
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| current carrying leads inside the | |||
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| WELDANPOWER | 125. | See | |
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| Wiring Diagram. |
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| 2. If the OCV is low at the welder | |||
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| output | terminals, | perform | the |
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| Engine | Throttle | Adjustment | |
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| Test. |
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| 3. Perform the Output Rectifier | |||
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| Bridge Test. |
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| 4. Check for shorted or grounded | |||
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| windings in the choke (L1). |
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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
WELDANPOWER 125
