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| TROUBLESHOOTING | ||
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| Observe all Safety Guidelines detailed throughout this manual | ||
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| PROBLEMS | POSSIBLE CAUSE | RECOMMENDED |
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| (SYMPTOMS) | COURSE OF ACTION | |
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10. Speed does not change when | a. |
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| weld current flows. Status lights | the same value. |
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| are solid green. | b. Possible problem with current |
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| sensor electronics in power |
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| source. Check power source man- |
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| ual to trouble shoot current sensor |
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| electronics. |
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11. | Voltmeter and/or ammeter do | a. 67 and/or 21 voltage sense leads |
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| not function properly even | may have intermittent or poor con- |
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| though status lights are solid | nections. Check. |
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| green. Welding may vary from |
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| normal procedure. | b. Possible problem with power |
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| source electronics. |
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12. | Purge switch on feed head does | a. Defective gas purge switch or |
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| not activate solenoid but trigger | feed head board. Check continuity | If all recommended possible areas of | |
| closure in MIG or pulse modes | with gas purge switch held down | ||
| does. | across J1 pins 3 and 5. Release | misadjustment have been checked | |
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| purge switch and note there | and the problem persists, Contact |
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| should be no continuity now. If | your local Lincoln Authorized |
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| either of these fail, the problem is | Field Service Facility. |
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| either in the gas purge switch or |
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| harnessing. If no failure, replace |
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| feed head board. |
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13. | Cold feed switch does not acti- | a. Defective cold feed switch or feed |
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| vate the motor but trigger does | head PC board. Check continuity |
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| in MIG or Pulse modes. LEDs | with cold feed switch held up |
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| are solid green on both CB and | across plug pins 3 and 4 of J1. |
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| feed head boards. | Release the cold inch switch and |
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| note that there should be no conti- |
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| nuity now. If either of these fail, |
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| the problem is either in the purge |
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| switch or harnessing. If continuity |
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| O.K., replace feed head board. |
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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 your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.