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| TROUBLESHOOTING & REPAIR |
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| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
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| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | |
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| WELDING PROBLEMS |
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Machine loses output while weld- | 1. Check the yellow High | 1. | Perform the Welding |
ing. Fans and display are func- | Temperature light on the front- |
| Feedback Test. |
tioning properly. | panel. If the light is “ON,” then | 2. | Perform the Switch Board |
| refer to the Output Problems | ||
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| Test. | |
| section in this table relating to |
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| this condition. | 3. | Perform the Snubber and |
| 2. Check for proper input volt- |
| Bleeder Resistor Test. |
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| ages (per machine nameplate). | 4. | Perform the Static Capacitor |
| 3. Check for balanced three- |
| Balance Test. |
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| phase input supply voltages. | 5. | Perform the Dynamic |
| 4. Check electrode and work |
| Capacitor Test. |
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| cables for loose or poor con- | 6. | Perform the appropriate Wire |
| nections. |
| Feeder Trigger Circuit Test. |
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| If a |
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| is used, perform the |
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| Remote Control Kit Trigger |
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| Circuit Test. |
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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 1-
