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| TROUBLESHOOTING & REPAIR |
| |
| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
|
| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | |
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | |
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| STICK WELDING PROBLEMS |
| |
Stick electrode “blasts off” when | 1. | The weld current is set too | 1. The control board may be |
touched to workpiece. The |
| high for electrode size. | faulty. Replace. |
machine operates properly in the | 2. | If the Start switch is ON, the |
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TIG mode. |
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| start current may be set too |
| |
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| |
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| high for electrode size. |
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| 3. | The Arc Force control may be |
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| set too high. |
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The arc seems too hot, and | 1. | The Arc Force control may be | 1. The control board may be |
reducing the Peak Current control |
| set too high. | faulty. Replace. |
does not help. The machine oper- | 2. | If the Start switch is ON, the |
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ates properly in the TIG mode. |
| ||
| start current may be set too |
| |
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| |
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| high or the start time may be |
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| set too long. |
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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
SQUARE WAVE TIG 355
