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TROUBLESHOOTING & REPAIR | ||||||||
TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | |||
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| PROBLEMS | POSSIBLE AREAS OF |
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| RECOMMENDED |
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| (SYMPTOMS) | MISADJUSTMENT(S) |
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| COURSE OF ACTION |
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| TIG WELDING PROBLEMS |
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No high frequency. Machine is in | 1. If the machine location is in a | 1. Check the high voltage trans- | ||||||
the TIG mode and has normal out- | highly dirty environment with con- |
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| former (T3). The normal resis- | ||||
put. |
| ductive contaminants, check and |
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| tance of the secondary winding | |||
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| clean the spark gap with a low |
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| of the high voltage transformer is | |||
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| pressure air stream per the main- |
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| 12.5k ohms. |
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| tenance instructions. |
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| 2. Check spark gap operation and |
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| WARNING |
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| ELECTRIC SHOCK CAN | |||
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| setting. Normal is (0.020"). |
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| Refer to Maintenance section of |
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| KILL. When 115VAC is |
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| this manual. |
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| applied to the primary of | ||
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| T3. A very high voltage is devel- | ||||
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| oped on the secondary winding. |
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| For assistance call the Lincoln |
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| 2. Check the values of R3, and C4. | |||||
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| 3. Perform the T1 Transformer Test. | |||||
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| 4. The control board may be faulty. | |||||
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| Replace. |
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No gas flow when Amptrol is activat- | 1. | The gas supply is either empty or 1. Possible gas supply problems. | |
ed in the TIG mode. Machine has |
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normal output - fan runs. |
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| Consult your local welder/gas dis- |
A "click" can be heard indicating that | 2. | The flow regulator may be set | tributor. |
the gas solenoid valve is operating. |
| too low. |
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| 3. | Check the gas hose for kinks or |
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| blockages. |
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| 4. | Check the filter screen inside gas |
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| inlet fitting to solenoid valve. |
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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