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| TROUBLESHOOTING & REPAIR | ||||||
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| Observe all Safety Guidelines detailed throughout this manual |
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| PROBLEMS |
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| POSSIBLE AREAS OF |
| RECOMMENDED | |
| (SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION | ||
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| WELDING PROBLEMS |
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| Poor arc starting when the DC- | 1. | Make sure the proper welding | 1. | Check the 3CR reed switch. | ||
| 1000 is in the CV |
| procedures are being used |
| The voltage from lead #215 to | ||
| Innershield Modes. |
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| (wire feed speed, arc voltage |
| lead #220 should be 8 VDC | |
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| and wire size). |
| when the | |
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| idle condition (on but not | |
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| 2. | Check weld cables for loose |
| welding). When the machine | |
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| or faulty connections. |
| is producing welding current, | |
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| the reed switch (3CR) should | |
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| close and the voltage from | |
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| #215 to #220 should drop to | |
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| zero. |
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| 2. | Perform the Firing Board | |
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| Test. |
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| 3 | Perform the | SCR Output |
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| Bridge Test. |
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| 4. | The control board may be | |
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| faulty - Replace. | |
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| Poor arc characteristics in all | 1. | Check for the correct input | 1. | Check the | Mode Switch | |
| processes. |
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| voltages on the three phase |
| (SW4) and the associated | |
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| input lines at the |
| wiring for loose or faulty con- | |
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| nections. See wiring diagram. | |
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| 2. Make sure the proper welding |
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| procedures are being used | 2. | Check the 3CR reed switch. | |
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| (wire feed speed, arc voltage |
| The voltage from lead #215 to | |
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| and wire size). |
| lead #220 should be 8 VDC | |
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| when the | |
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| 3. | Check the welding cables for |
| idle condition. When the | |
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| loose or faulty connections. |
| machine is producing welding | |
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| current, the reed switch (3CR) | |
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| should close and the voltage | |
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| from #215 to #220 should | |
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| drop to zero. |
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| 3. | Perform the Firing Board | |
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| Test. |
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| 4. | Perform the | SCR Output |
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| Bridge Test. |
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| 5. | The control board may be | |
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| faulty - Replace. | |
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call
