TROUBLESHOOTING
Troubleshooting Guide
Observe Safety Guidelines 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) |
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| TIG WELDING PROBLEMS |
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| Machine has low output when in |
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| 1. Machine must be in “Local” |
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| TIG |
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| Control Mode when |
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| used. |
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| Weak high frequency - machine |
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| 1. | Spark gap may be misadjusted. |
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| has normal welding output. |
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| Check and reset per |
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| maintenance instructions. |
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| 2. | Improper shielding gas flow. |
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| Adjust for a flow of 10 to 30 |
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| CFH (4.7 to 14.1 l/min.) for |
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| most applications. |
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| 3. | Work and electrode cables in |
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| poor condition allowing high |
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| frequency to “Leak Off”. Use |
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| good quality cables with a high |
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| natural rubber content, such |
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| as Lincoln Stable Arc Cable. |
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| Cables should be as short as |
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| possible. |
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| The display shows zero amps, but |
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| 1. | The arc start switch or amptrol |
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| indicates open circuit voltage |
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| may be defective. There should |
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| (approximately 53V). The arc start |
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| not be any continuity between |
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| switch or amptrol is not actuated. |
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| pins “D” and “E” on the arc start |
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| cable connector, unless the |
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| unit is actuated. |
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| 2. | If an amptrol is not being used, |
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| the machine must be in the |
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| Local Control Mode. |
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| High frequency “Spark” is present |
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| 1. | Torch may be faulty. |
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| at tungsten electrode, but operator |
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| 2. | If an amptrol is not being used, |
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| is unable to establish a welding arc. |
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| then the machine must be in |
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| Machine has normal open circuit |
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| the Local Control Mode. |
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| voltage (approximately 53V). |
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| 3. | Tungsten electrode may be |
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| too large for the process. |
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| 4. | If helium shielding gas is being |
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| used, then reduce percentage |
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| of helium. |
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| 5. | If TIG welding in the DC |
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| negative mode, then a properly |
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| sharpened thoriated tungsten |
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| should be used. |
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| 6. | Check the welding cables and |
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| output stud connections. |
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RECOMMENDED COURSE OF ACTION
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 Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
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