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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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| PROBLEMS | POSSIBLE AREAS OF |
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| (SYMPTOMS) |
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| MISADJUSTMENT(S) |
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| COURSE OF ACTION |
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| TIG WELDING PROBLEMS |
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| No gas or water flow when arc start |
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| 1. Gas supply is empty or not |
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| Possible gas or water supply |
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| switch or amptrol is activated in the |
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| turned on. |
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| problem. |
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| TIG Mode. Machine has output - |
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| fan runs. When toggling between |
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| 2. Gas or water hose may be |
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| Contact The Lincoln Electric |
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| the Stick and TIG Modes a “Click” |
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| pinched. |
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| Service Department (216) 383- |
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| can be heard indicating that the |
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| 2531 or |
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| solenoids are operating. |
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| 3. Gas or water solenoid may be |
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| blocked with dirt. Use filters |
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| to prevent reoccurrence. |
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| Consult your Local welder/gas |
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| distributor. |
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| Arc rectification when AC TIG weld- |
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| 1. Tungsten electrode may be |
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| 1. Check components R3, R4, |
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| ing. |
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| too small for process. |
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| and C2 in the high voltage |
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| 2. Manual balance control may |
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| transformer primary circuit. |
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| Replace if faulty. |
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| be misadjusted. Readjust to |
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| the negative direction. |
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| 2. Check the SCR bridge. See |
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| 3. If helium gas is being used, |
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| Static and Active SCR Tests. |
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| reduce percentage of helium. |
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| There is no gas or water flow when |
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| None |
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| the arc start switch or amptrol is |
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| be defective. |
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| activated in the TIG mode. The |
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| machine has output and the fan |
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| Check for 115vac at the sole- |
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| runs. When toggling between the |
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| noid leads. The machine must |
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| Stick and TIG modes a “click” |
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| be in the TIG mode and the arc |
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| CANNOT be heard indicating that |
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| start switch activated. |
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| the solenoids are NOT operating. |
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| 2. If 115vac is not present at the |
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| solenoids then check the |
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| Protection/Snubber board. See |
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| Protection/Snubber Board |
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| Continuity Test. |
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| 3. If the above tests are OK - |
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| Then the Control board may be |
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| faulty. Replace. |
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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