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TROUBLESHOOTING & REPAIR | |||||
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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) | MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| FUNCTION PROBLEMS |
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Machine shuts off (input contac- | 1. Remove all welding cables | 1. Check for grounds and or | |||
tor drops out) when the welder | and control cables from the |
| shorts in the #73, #74, #75, | ||
output terminals are electrically |
| #76, #77 circuit. See wiring | |||
energized. (#2 to #4 closure at | the terminal strip. If the |
| diagram. |
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terminal strip.) | machine does NOT shut off |
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| and normal open circuit volt- | 2. | Check for grounds and shorts | |
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| age is present at the welder |
| in the welder output terminals | |
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| output terminals, the problem |
| and associated leads. See | |
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| is external to the |
| wiring diagram. |
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| Either the remote leads #73, |
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| #74, #75, #76 or #77 are | 3. | Check the output shunt and | |
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| grounded to the negative out- |
| associated leads. See wiring | |
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| put cable, or there is a short |
| diagram. |
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| on the welding output termi- |
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| nals. | 4. Perform the Control Board | ||
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| Test. |
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| 2. If the machine still shuts off |
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| when all control and welding |
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| cables are removed, then the |
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| problem is internal to the DC- |
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| 1000. |
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The | 1. Contact your local Lincoln | 1. The input contactor (1CR) | |||
when the Stop button is pushed. | Authorized Field Service |
| contacts may be stuck closed. | ||
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| Facility. |
| Check and replace if neces- | |
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| sary. |
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| 2. The Interlock contacts (part of | ||
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| 1CR) may be faulty. Replace | |
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| if necessary. |
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| 3. The Start/Stop button may be | ||
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| faulty. Check or 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
