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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 | ||
| (SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||
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| OUTPUT PROBLEMS |
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| The input contactor operates – the | 1. If the amber thermal protection | 1. | Perform the Main Transformer | |
| fan runs – the pilot light is lit – but | light is lit, the primary or sec- |
| Test. | |
| the machine has no welding out- | ondary thermostat is open. | 2. | Perform the SCR/Diode | |
| put. | Allow machine to cool. | |||
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| Rectifier Bridge Test. | |||
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| 2. Make certain the output trigger | 3. | The control board may be | |
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| circuit (#2 and #4) is being acti- | |||
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| faulty. Replace. | ||
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| vated either by an external “clo- |
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| sure” or by the output terminals |
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| switch (S3). |
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| 3. Check the 10A circuit breaker in |
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| the 42VAC line. |
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| 4. If remote control is not being |
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| used, make certain the Output |
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| Control switch (S2) is in the |
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| OUTPUT CONTROL “LOCAL” |
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| position. |
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| 5. Check for loose or faulty weld |
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| cable connections. |
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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
IDEALARC
LINCOLN ®
ELECTRIC
