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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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PROBLEMS | POSSIBLE AREAS OF |
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(SYMPTOMS) | MISADJUSTMENT(S) |
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| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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Major physical or electrical damage | 1. Contact your local Lincoln | 1. Contact the Lincoln Electric |
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is evident. |
| Authorized | Field | Service | Service Department at |
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No welding output in all modes. | 1. Place the Welding Terminals | 1. Check for loose or faulty con- |
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The engine operates normally. The |
| switch in the “WELD TERMI- | nections on the heavy current |
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auxiliary output is normal. |
| NALS ON” position. If the prob- | carrying leads | between the |
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| lem is solved, the fault may be | output bridge, the power mod- |
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| in the external control cable (if | ule, the choke, the shunt and |
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| used), leads #2 and #4. | See | the output | terminals. | Check |
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| the Wiring Diagram. |
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| thermostat TS1 and associated |
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| 2. | With the engine at high | idle | wiring. | See | the | Wiring |
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| Diagram. |
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| (3700RPM), the machine in the |
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| Stick mode and the OUTPUT | 2. Check the Welding Terminals |
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| CONTROL at maximum, check | switch and associated leads (2 |
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| for the presence of approxi- | and 4). | See | the | Wiring |
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| mately 80VDC (open | circuit | Diagram. |
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| voltage) at the output terminals. | 3. If the correct OCV is present |
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| 3. | If the correct OCV is present at | when the | Welding Terminals |
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| the welding | output terminals, | switch is in the “WELD TERMI | - | |||||
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| check the | welding | cables, | NALS ON” position, the By- |
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| clamps and electrode holder for | pass Board may be faulty. Also |
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| loose or faulty connections. |
| check associated wiring. See |
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| 4. Air flow may be blocked or | the Wiring Diagram. |
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| restricted. |
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| 4. Check gate leads (#23 and |
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| #25) for loose or faulty connec- |
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| tions. See the Wiring Diagram. |
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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, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
