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| TROUBLESHOOTING & REPAIR |
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| Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE | ||||||||
| detailed in the beginning of this manual. |
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| POSSIBLE AREAS OF |
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| PROBLEMS | RECOMMENDED |
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| (SYMPTOMS) |
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| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| TIG MODE PROBLEMS |
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| Machine has low output when in |
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| 1. Machine must be in “Local” |
| Machine controls may be set incor- |
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| TIG |
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| Control Mode when |
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| used. |
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| Contact The Lincoln Electric |
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| Service Department (216) 383- |
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| 2531 or |
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| Weak high frequency - machine |
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| 1. Spark gap may be misadjusted. |
| 1. | Check for an open or arcing |
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| has normal welding output. |
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| Check and reset per |
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| high frequency component. |
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| maintenance instructions. |
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| Replace as required. |
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| 2. Improper shielding gas flow. |
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| (Examples. R3, R4, C2.) Refer |
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| to wiring diagram. |
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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 |
| 2. | If spark is weak at the spark |
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| most applications. |
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| gap check or replace high fre- |
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| 3. Work and electrode cables in |
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| quency circuit. ( Examples. T3, |
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| C3, L3, L4.) |
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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 |
| 1. | Check Trigger circuit. See Arc |
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| indicates open circuit voltage |
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| may be defective. There should |
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| Start Trigger Circuit Test. |
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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 | 2. | Control board may be faulty. |
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| cable connector, unless the |
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| Replace. |
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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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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call
