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TROUBLESHOOTING AND REPAIR |
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Observe Safety Guidelines detailed in the beginning of this manual. |
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PROBLEMS |
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| POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) |
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| MISADJUSTMENT(S) | COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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Major physical or electrical damage | 1. | Contact | your | local authorized | 1. Contact the Lincoln Electric | |||||
is evident when the sheet metal |
| Lincoln | Electric Field | Service | Service Department | |||||
cover(s) are removed. |
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| Facility for assistance. |
| 9353. |
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The machine is | 1. | Make sure the input power switch | 1. Check the input power switch for | |||||||
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| is in the ON position. |
| proper operation. Also check the | ||||||
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| 2. | Check the main input fuses. If | associated leads | for loose or | |||||
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| faulty connections. | See | Wiring | ||||||
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| open replace. |
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| Diagram. |
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| 3. | Make sure the correct input volt- | 2. Perform | the Input | Filter | Board | |||
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| age is applied to the machine. | Test. |
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The main input fuses or breakers | 1. | Make certain the fuses or break- | 1. The Input Filter Board may be | |||||||
repeatedly fail. |
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| ers are properly sized for the | faulty. | Perform the Input Filter | |||||
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| input draw of the machine. | Board Test. |
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| 2. | The welding procedure may be | 2. The Main IGBT Inverter Board | ||||||
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| drawing too much input current or | may be faulty. Perform the Main | ||||||
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| the duty cycle may be too high. | IGBT | Inverter | Board | Low | |||
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| Reduce | the | welding | current | Voltage Supply Test. |
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| and/or reduce the duty cycle. |
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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