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| TROUBLESHOOTING & REPAIR | ||||
| 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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| STICK WELDING PROBLEMS |
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| The stick electrode | 1. Welding current may be too high | 1. Perform the SCR Bridge Test. | ||
| when touched to the work piece. | for the electrode size. Reduce | 2. The control board may be faulty. | ||
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| current control setting or use a | ||
| NOTE: BEFORE REPLACING A | larger diameter electrode. |
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| CONTROL BOARD |
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| If an Advanced Control Panel is |
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| installed, remove it and replace |
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| the Jumper in connector |
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| the machine functions normally, |
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| the Advanced Process panel or |
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| harness is defective. |
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Variable or sluggish welding arc 1. | Check the work and electrode | 1. | Check the polarity switch for |
when welding in the Stick mode. | cables for loose or poor connec- |
| excessive wear or faulty connec- |
2. | tions. | 2. | tions. |
The welding cables may be too | Check the interior heavy current | ||
| small or too long to permit the |
| carrying leads and connections. |
3. | desired current to flow. |
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The welding current may be set |
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| too low. |
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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