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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
| TROUBLESHOOTING GUIDE | ||||
detailed in the beginning of this manual. |
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||||
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| FUNCTION PROBLEMS |
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The meters do not light in either CV | 1. In the CC mode, only the AMPS | 1. | Check all the plug connections | |||
or CC modes. | meter will light. In the CV mode, |
| to the Weld Control Board for | |||
| only the VOLTS meter will light. |
| loose or faulty connections. | |||
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| See the Wiring Diagram. | |||
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| 2. | Check the leads and connec- | |||
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| tions between the meters and | |||
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| the Weld Control Board. See | |||
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| the Wiring Diagram. |
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| 3. | Perform the | Analog | Control | |
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| Power Supply Board Test. | |||
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| 4. | The meters may be faulty. | |||
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| 5. | The Weld Control Board may be | |||
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| faulty. Replace. |
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One or both of the meter’s readings | 1. Make sure the test or external | 1. | Check shunt | feedback | leads | |
are not accurate. | meter is reliable and accurate. |
| R326, 327, R226, 227, plugs | |||
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| P21 and P6 for loose or faulty | |||
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| connections. | See the Wiring | ||
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| Diagram. |
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| 2. | Check the integrity of lead 237 | |||
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| at plug P12 on the Weld Control | |||
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| Board and also at plug P31 on | |||
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| the Peripheral Board. |
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| 3. | See the Digital Meter Calibra- | |||
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| tion and Adjustment Test in | |||
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| the Maintenance section. | |||
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| 4. | Perform the | Analog | Control | |
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| Power Supply Board Test. | |||
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| 5. | The Weld Control Board may be | |||
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| faulty. Replace. |
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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