TROUBLESHOOTING
TROUBLE | CAUSE | WHAT TO DO | ||
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A. Welder will not weld. | 1. | Line switch not turned “On”. | 1. | Place line switch in “On” posi- |
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| Supply line fuse blown. |
| tion. Replace. (Look for reason |
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| for blown fuse first). |
| 2. | Power circuit dead. | 2. | Check supply line voltage. |
| 3. | Broken power lead. | 3. | Repair. |
| 4. | Wrong voltage. | 4. | Check voltage against rating |
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| plate. Check reconnect panel |
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| jumper. |
| 5. | Electrode or work lead loose or | 5. | Tighten and repair connections. |
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| broken. |
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| 6. | Open transformer circuit. | 6. | Send to repair shop to have coils |
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| replaced. |
| 7. | Polarity switch not centered. | 7. | Center switch handle on DC(+), |
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B. Welder welds, but soon stops | 1. | Proper ventilation hindered. | 1. | Make sure all case openings are |
welding (DC only). |
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| free for proper circulation of air. |
| 2. | Welder loaded beyond rating. | 2. | Operate at normal current and |
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| duty cycle consistent with rating. |
| 3. | Fan motor inoperative. | 3. | Check leads and motor bear- |
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| ings. Fan motor can be tested |
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| on 115V line; with welder on, |
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| voltage across fan motor should |
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| be approximately 115V. |
| 4. | Poor internal connections. | 4. | Check for loose or hot connec- |
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| tions and tighten. |
| 5. | Excessive dust accumulation in | 5. | Blow out welder with low pres- |
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| welder. |
| sure. |
6.
6. Carefully clean in naptha.
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