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TROUBLESHOOTING & REPAIR |
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| detailed in the beginning of this manual. | TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines |
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| PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
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| (SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| WELD OUTPUT PROBLEMS |
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| The machine welds, but it will not | 7. | The weld cables may be coiled, | 6. | The output control or arc control |
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| maintain a steady output. The arc |
| or wrapped around metal reels |
| potentiometers may be defec- |
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| may suddenly get hotter or cold- |
| or racks. This can cause exces- |
| tive or grounded. | The | mode |
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| er.(continued) |
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| sive electrical inductance in the |
| switch may also be faulty. |
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| weld circuit. Try welding after |
| Perform | the | and | Control |
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| uncoiling the cables, or discon- |
| Potentiometer |
| Mode |
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| nect the existing weld cables | 7. | Switch Resistan | Test. |
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| and attach a set of adequately | The Amphenol receptacles may |
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| sized, short test cables. |
| be contaminated | or defective. |
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| Perform | the |
| Remote |
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| 8. | ceptacle Resistance Test. |
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| Replace | the weld control PC |
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| The weld output cannot be adjust- | 1. Remote control devices com- | 1. | Perform | the |
| Remote |
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| ed with the front panel output con- |
| pletely disable the front panel |
| Receptacle Resistance Test. |
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| trol knob in one or more weld |
| control in all modes except | 2. | The output control potentiome- |
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| modes. The weld output terminals |
| touch start TIG mode. Make |
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| have normal OCV (Open Circuit |
| sure nothing is plugged into | 3. | ter may be defective. |
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| Voltage), The AC auxiliary power is |
| either of the Amphenol recepta- | Perform | the |
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| normal and the engine operates | 2. | cles. |
| Potentiometer | and |
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| normally. |
| Check for dirt or moisture cont- |
| Switch Resistance Test. |
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| amination in either 6 pin or the |
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| 14 pin amphenol receptacle. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
