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TROUBLESHOOTING & REPAIR | |||||||||
TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||||
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| detailed in the beginning of this manual. | ||
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PROBLEMS |
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| POSSIBLE AREAS OF |
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(SYMPTOMS) |
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| MISADJUSTMENT(S) |
| COURSE OF ACTION | ||||
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| WELDING PROBLEMS (Continued) |
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The contact tip seizes in the gas |
| 1. The tip being over heated due to | 1. Make sure tip is tight in diffuser. | ||||||
diffuser. |
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| excessive | current and/or | high |
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| duty cycle welding. |
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| 2. A light application of high tem- |
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| perature |
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| (such | as | Lincoln E2607 |
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| Graphite | Grease) | may | be |
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| applied to the contact tip |
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| threads. |
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The welding arc is variable and |
| 1. Check | the | welding | cable | con- | 1. Perform the SCR Rectifier | ||
sluggish. |
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| nections for loose or faulty con- | Assembly Tests. |
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| nections. |
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| 2. The control board may be faulty. | |
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| 2. Make sure the wire feed speed, | Replace. |
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| voltage, and shielding gas are |
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| correct for the process being |
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| used. |
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The arc striking is poor. |
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| 1. Check | the | welding | cable | con- | 1. The output capacitor bank may | |
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| nections for loose or faulty con- | be faulty. Check for loose con- | |||||
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| nections. |
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| nections at the capacitors. Also | ||
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| check for leaky | capacitors. |
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| 2. Make sure the wire feed speed, | Replace if necessary. | |||||
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| voltage, and shielding gas are |
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| correct for the process being | WARNING: The liquid elec- | |||||
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| used. |
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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. | |
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| 2. The control board may be faulty. | |
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| 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