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TROUBLESHOOTING & REPAIR | |||||
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| TROUBLESHOOTING GUIDE |
| Observe Safety Guidelines | ||
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| detailed in the beginning of this manual. | ||
| PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
| (SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
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| WELDING PROBLEMS |
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| Machine often “noodle welds” with | 1. The machine may be trying to | If problem occurs all the time - |
| a particular procedure. | deliver too much power. When | change the control board. |
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| the average output current |
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| exceeds a maximum limit, the |
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| peak current is drastically cut |
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| back. Lower the welding para- |
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| meter settings and/or increase |
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| the stickout length to eliminate |
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| this problem. |
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| Power Wave 450 – When the |
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| average output current exceeds |
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| 540 amps, the peak output cur- |
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| rent is folded back to 100 amps. |
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| Erratic output or greater than 6 | None | Replace shunt and lead assembly. |
| amps reading on display with no |
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| output. |
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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 1-
