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TROUBLESHOOTING & REPAIR | ||
Observe Safety Guidelines |
| 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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Molten weld puddle appears exces- | 1. The Wire Type switch may be in | 1. The IGBT module may be faulty. |
sively "violent." | the wrong position for the elec- | Check or replace. |
| trode wire being used. | 2. The IGBT driver PC board may |
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| 2. The Peak Current or Back- | be faulty. |
| ground Setting may be too high. | 3. The control PC board may be |
| Adjust for optimum welding per- | |
| faulty. | |
| formance. | |
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| 3. The Tailout may not be set cor- |
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| rectly for the process. (STT II |
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| Only) |
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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
