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| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual | ||||||||||||||
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| PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | ||||||||||||||
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| (SYMPTOMS) |
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| MISADJUSTMENT(S) |
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| COURSE OF ACTION |
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| OUTPUT PROBLEMS |
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| Major Physical or Electrical |
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| 1. | Contact your Local Lincoln |
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| Damage is Evident |
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| Authorized Field Service Facility. |
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| There is no wire feed or open cir- |
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| 1 | The gun trigger or cable may be |
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| cuit voltage when the gun trigger is |
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| faulty. Check or replace gun |
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| pulled. The machine displays are |
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| assembly. |
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| lit indicating input power to the PM |
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| 255. |
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| 2. | The thermal protection circuit |
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| may be activated. If this is the |
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| case, the display will show “too |
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| hot”. Allowing the machine to |
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| cool will clear the error condition. |
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| 3. | Make sure input voltage is cor- |
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| rect and matches nameplate rat- |
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| ing and reconnect panel configu- |
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| ration. |
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| Output voltage and wire feed is pre- |
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| 1. | Remove gun assembly from |
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| sent when gun trigger is not pulled |
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| machine. If problem is solved |
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| (not activated). |
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| gun assembly is faulty. Repair or |
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| If all recommended possible areas |
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| replace. |
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| of misadjustment have been |
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| 2. | If problem persists when gun |
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| checked and the problem persists, |
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| Contact your local Authorized |
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| assembly is removed from |
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| Field Service Facility. |
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| machine then the problem is |
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| within the PM 255. |
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| Machine output is low. Welds are |
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| 1. | Check input voltage. Make sure |
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| “cold”, weld bead is rounded or |
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| input voltage matches name- |
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| bumped up demonstrating poor |
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| plate rating and reconnect panel |
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| wetting into plate. |
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| configuration. |
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| 2. | Make sure settings for wire feed |
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| speed and voltage are correct |
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| for process being used. |
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| 3. | Make sure output polarity is cor- |
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| rect for process being used. |
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| 4. | Check welding cables and gun |
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| assembly for loose or faulty con- |
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| nections. |
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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 AUTHORIZED FIELD SERVICE FACILITY for assistance before you proceed.
PM 255
