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| TROUBLESHOOTING & REPAIR | |
| TROUBLESHOOTING GUIDE | Observe Safety Guidelines |
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| detailed in the beginning of this manual. |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||
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| WELDING PROBLEMS |
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The welding arc is “cold.” The | 1. Check for loose or faulty con- | 1. Check for the correct open cir- | ||
engine runs normally (3700 RPM | nections at the weld output ter- | cuit voltage (OCV) at the weld- | ||
no load). The auxiliary power is | minals and welding cable con- | ing output terminals. If the cor- | ||
functioning normally. | nections. | rect voltage is present at the | ||
| 2. The welding cables may be too | output terminals, then check for | ||
| loose connections on the heavy | |||
| long or coiled, causing an | |||
| current carrying leads inside the | |||
| excessive voltage drop. | |||
| RANGER | |||
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| 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 reactor and also | ||
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| in the main stator. See Wiring | ||
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| Diagram. |
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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
RANGER