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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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| OUTPUT PROBLEMS |
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Machine has no output – fans are | 1. Turn power OFF immediately. | 1. | Perform the Auxiliary | |
running – display is on – a “click- | 2. Check for proper input voltage |
| Transformer Test #1 | |
ing” sound is heard coming from |
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(per machine nameplate). | 2. | Perform the Main Contactor | ||
the machine. | ||||
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| Test. | ||
| 3. Make certain the reconnect |
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| panel is configured properly for | 3. | Perform the Reconnect | |
| the applied voltage. |
| Switch Test #1. | |
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| 4. | Perform the Reconnect | |
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| Switch Test #2. | |
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| 5. | Perform the Input Rectifier | |
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| Test. | |
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| 6. | Perform the Switch Board | |
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| Test. | |
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| 7. | Perform the Snubber and | |
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| Bleeder Resistor Test. | |
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| 8. | The protection board may be | |
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| faulty. Replace. | |
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| 9. | The input filter capacitors may | |
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| be 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, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-
