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| TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE | |
| detailed in the beginning of this manual. |
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| PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED | |
| (SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION | |
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| WELDING PROBLEMS |
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| Porosity in the weld. |
| 1. Make sure the gas type and | 1. Contact the Lincoln Electric | |
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| flow rate is correct for the pro- | Service Department. | |
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| cedure being used. Shield the | 3877. |
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| work from excessive outside air |
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| currents. |
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| 2. Check the gun and nozzle for |
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| leaks or obstructions. |
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| 3. Make certain the machine and |
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| wire feed settings are correct for |
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| the process. |
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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
