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| TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
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| 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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| WELDING PROBLEMS |
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| Poor arc | characteristics | when | 1. Make sure the correct weld pro- | 1. Check | reed | switch CR3 for | ||
| welding in | the constant | voltage | cedures are being used. |
| proper | operation. | Switch | |
| (CV) mode. |
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| (Electrode, Gas, Etc.) |
| should be normally open until | |||
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| 2. Check the welding cables for |
| weld current is established. | |||
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| loose or faulty connections. | 2. | Remove plug P6 from the start | |||
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| board. If problem is resolved, | |||
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| the start board may be faulty. | |||
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| Replace. See Wiring Diagram. | |||
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| 3. | Check | the | welding | Mode |
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| switch (S4), the microswitches, | |||
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| and the associated wiring. | |||
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| 4. Check | the | output capacitors | ||
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| and connections. A capacitor | |||
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| failure is indicated if the small | |||
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| vent plug on top of a capacitor | |||
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| is raised or blown out. |
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| WARNING: The liquid elec- | |||
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| trolyte in these capacitors is | |||
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| toxic. Avoid contact with any | |||
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| portion of your body. Clean | |||
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| up vented | electrolyte | using | |
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| rubber gloves and a water | |||
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| damped cloth. Any elec- | |||
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| trolyte which gets on skin, | |||
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| clean with soap and water. | |||
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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
