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| TROUBLESHOOTING & REPAIR | |||||||
| Observe all Safety Guidelines detailed throughout this manual |
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| PROBLEMS |
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| POSSIBLE AREAS OF |
| RECOMMENDED | |
| (SYMPTOMS) |
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| MISADJUSTMENTS(S) |
| COURSE OF ACTION | |
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| MODE FUNCTION PROBLEMS |
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| Only the strike mode functions, when | 1. | The logic board may be faulty. |
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| the unit is at idle, regardless of the |
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| Replace. |
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| selector switch position. |
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| 2. | The procedure board may be |
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| faulty. |
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| Only the strike mode functions while |
| 1. | While the unit is welding check | . If light 7D is NOT lit, when weld | |||
| welding. The unit stays in the strike |
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| light 7D on the logic board. It |
| current is present, | connect a | |
| mode and does not progress through |
| should be ON when welding cur- |
| jumper wire from terminal #528 to | |||
| the welding sequence. |
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| rent is present. If light 7D is ON |
| #500 on terminal strip TS1. See | |
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| the logic board may be faulty. |
| wiring diagram. If light 7D does | |
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| light check the CR4 reed switch | |
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| 3. | If light 7D is NOT lit when weld |
| and associated leads and connec- | |
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| current is present make sure the |
| tions. See wiring diagram. | |
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| weld cables have been properly |
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| routed through the cable clamp | 2. | If 7D does NOT light, with the | |
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| on the left side of the control box. |
| jumper wire in place, check the | |
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| #528 lead and the #500 lead | |
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| between the TS1 terminal strip | |
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| and the logic board. See wiring | |
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| diagram. |
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| 3. The logic board may be faulty. | ||
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| Replace. |
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| The strike light is OFF and neither |
| 1. | Check light 7D on the logic board. | 1. | If light 7D is ON check the CR4 | ||
| strike control functions. The other |
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| If it is off the logic board may be | reed switch and associated leads. | |||
| mode lights work. The unit will not |
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| faulty. Replace. | See wiring diagram. |
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| feed wire when the start button is |
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| pressed. |
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| 2. | If the start light is on all the time |
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| the start board (if used) may be |
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| faulty. Replace or install jumper |
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| plug in procedure board. |
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| 3. | If the crater light is on all the time |
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| the crater board (if used) may be |
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| faulty. Replace or install jumper |
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| plug in procedure board. |
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| 4. | If the weld light is on all the time |
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| the logic board may be faulty. |
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| 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
