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| TROUBLESHOOTING AND REPAIR |
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Troubleshooting Guide – See Wiring Diagrams for location of specified |
| Observe Safety Guidelines | ||||||
components and for troubleshooting of specific circuits. | 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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| WELDING PROBLEMS |
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Poor arc striking with electrode | 1. | Make sure the settings for wire |
| 1. The output capacitors may be faulty. | ||||
sticking or blasting off. |
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| feed speed and voltage are cor- |
| Check for loose connections at the | |||
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| rect for the process being used. |
| capacitors. | Also | check for leaky |
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| capacitors. Replace if necessary. | ||
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| 2. | Make certain the gas shielding is |
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| correct for the process being |
| WARNING: The liquid electrolyte in | ||
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| used. |
| these capacitors is toxic. Avoid con- | ||
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| tact with any portion of your body. | ||
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| 3. | Make sure the machine’s recon- |
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| nect panel is configured properly |
| 2. Perform the Output Bridge Rectifier | ||
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| for the input voltage being |
| Test. |
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| applied. |
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The arc is unstable and or “hunting” | 1. | Check for a worn or melted con- |
| 1. Check for loose or faulty connections | ||||
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| tact tip. |
| at the output terminals, choke, output | ||
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| capacitors, | output | selector switch, |
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| 2. | Check for loose or faulty connec- |
| output contactor, and all heavy cur- | ||
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| tions on the work and gun cables. |
| rent carrying leads. | See the Wiring | |
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| Diagram. |
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| 3. | Make sure the electrode polarity |
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| is correct for the welding process |
| 2. Check the output selector switch for | ||
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| being used. |
| proper operation and good connec- | ||
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| tions. |
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| 4. | Check for rusted or dirty elec- |
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| trode wire. |
| 3. The output capacitors may be faulty. | ||
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| Check for loose connections at the | ||
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| 5. | Make sure the machine’s settings |
| capacitors. | Also | check for leaky |
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| and shielding gas are correct for |
| capacitors. Replace if necessary. | ||
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| the process being used . |
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| WARNING: The liquid electrolyte in | ||
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| these capacitors is toxic. Avoid con- | ||
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| tact with any portion of your body. | ||
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| 4. Perform the Output Bridge Rectifier | ||
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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 tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call
