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| TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE | ||
| detailed in the beginning of this manual. |
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| OUTPUT PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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| (SYMPTOMS) | 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 |
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is evident when the sheet metal | Lincoln Electric Field | Service | Service Department |
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cover(s) are removed. | Facility for assistance. |
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The machine is | 1. Make sure the input | power | 1. Check the input power switch for |
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switch 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. |
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| 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 |
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repeatedly fail. | 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 | may be faulty. | Perform the |
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| or the duty cycle may be too | Main IGBT Inverter Board Low |
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| high. Reduce the welding cur- | Voltage Supply Test. |
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| rent and/or reduce the duty |
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| cycle. |
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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