| TROUBLESHOOTING | |||
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| Observe all Safety Guidelines detailed throughout this manual | |||
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| PROBLEMS | POSSIBLE | RECOMMENDED |
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| (SYMPTOMS) | CAUSE | COURSE OF ACTION |
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STICK WELDING PROBLEMS
Stick electrode "blast off" when arc | 1. | Current may be set too high for |
is struck |
| electrode size |
| 2. | (Machine with Advanced Control |
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| PC board only) Hot Start level set |
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| too high |
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Stick electrode "sticks" in the weld | 1. | Current may be set too low for |
puddle |
| electrode size |
| 2. | (Machine with Advanced Control |
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| PC board only) Arc Force level set |
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| too low |
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If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.
TIG WELDING PROBLEMS
Poor starting in DC polarity | 1. | Input line may be too low |
| 2. | Bad connection at P11 of Control |
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| PC board |
| 3. | Bad Background rectifier, back- |
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| ground resistor R7, or background |
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| diode D2 |
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Arc "flutters" in DC polarity, o.k. in | 1. | Tungsten not "sharp" |
AC polarity |
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| 2. | Bad free wheeling diode D1 or its |
| connection | |
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Arc "flutters" in both DC & AC polari- | 1. | Tungsten electrode may be too |
ties |
| large in diameter for the current |
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| setting |
| 2. | Gas shielding may be insufficient. |
| 3. | Contaminated gas or leaks in the |
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| gas line, torch, or connections |
| 4. | Helium blend is used as a shield- |
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| ing gas |
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If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
