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TROUBLESHOOTING & REPAIR | |||||||
TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines |
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| detailed in the beginning of this manual. | |
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |||||
(SYMPTOMS) | MISADJUSTMENT(S) |
| COURSE OF ACTION | ||||
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| OUTPUT PROBLEMS |
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No output. Main fuses are open, | 1. | With the input power removed, | 1. Check the input power switch | ||||
indicating excessive current draw. |
| inspect input leads for possible | (S1) and the reconnect switch | ||||
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| shorts or grounds or miscon- | for "shorted" or "grounded" | ||||
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| wires or connections. | |
| 2. Install | new fuses and reapply | 2. Perform the Input Rectifier | ||||
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| power. | If fuses open again, | Test. | |||
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| contact | your | local | Lincoln | 3. Perform the Switch Board | |
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| Authorized | Field | Service | |||
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| Test. | |||||
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| Facility. |
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Machine loses output when gun | 1. | The overcurrent sensor is acti- | 1. The current sensor may be | ||||
trigger is pulled or arc is struck. |
| vated, indicating that too much | faulty. | ||||
Machine output returns after a few |
| output | current | is being drawn | 2. The control PC board may be | ||
seconds and trigger is pulled again. |
| from | the | machine. | Reduce | ||
| faulty. | ||||||
The thermal indicator light is lit. |
| welding | current demands or | ||||
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| remove the "fault" in welding |
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| cables. |
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| 2. Make sure that the gun tip is not |
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| "shorted" to the work surface |
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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
