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TROUBLESHOOTING & REPAIR | |||||
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 |
| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| FEEDING PROBLEMS |
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Poor stick electrode performance. | Check output welding cables. | 1. | Check for loose or burned con- | ||
Arc pops out. |
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| nections at choke, shunt, and | |
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| Is electrode DRY? Try welding with |
| output studs. See wiring dia- | |
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| another electrode from a different |
| gram in Section G. |
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| container. |
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| 2. | Test and inspect D6, D12, L1 | |
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| Make sure you have the correct |
| and L2. See Wiring Daigram in | |
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| electrode for your application. |
| Section G. |
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Machine makes “squealing” | noise | Check input lines and connections. | 1. | See Switch Board test. |
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while under load when welding. |
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Output power is low (less than 20 | Check input voltage and reconnec- | 2. | See Snubber Resistor test. |
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VDC on meter @ 100 amps). Input | tion procedures |
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voltage 230 VAC or lower. |
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| 3. | See Output Diode 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, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
