| TROUBLESHOOTING | |||
| Observe all Safety Guidelines detailed throughout this manual | |||
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| PROBLEMS | POSSIBLE | RECOMMENDED |
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| (SYMPTOMS) | CAUSE | COURSE OF ACTION |
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PROBLEMS
Machine has output, but no control. | 1. Check the Local/Remote output | |
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| switch (SW3) and associated |
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| leads. See wiring diagram. |
| 2. | Make sure the remote control |
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| leads #75, #76 and /or #77 are |
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| NOT grounded to either welding |
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| output. |
| 3. | Make sure control cable to feeder |
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| (if used) is connected properly. |
| 4. | The output control potentiometer |
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| may be faulty. |
| 5. | Control board transformer may be |
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| faulty |
| 6. | The control or firing board may |
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| be faulty. |
Machine does not have maximum | 1. Make sure the correct three- | |
output. |
| phase input is applied to the DC- |
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| 655 machine. |
| 2. | The output control potentiometer |
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| may be faulty. |
| 3. | The control or firing board may |
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| be faulty. |
Poor arc striking with semiautomatic | 1. | Make sure the mode switch is in |
or automatic wire feeders. |
| the proper position for the |
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| process. |
| 2. | Make sure the welding cables |
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| and connections are secure. |
| 3. | Check for correct welding proce- |
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| dures. |
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Contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance.
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.
