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| TROUBLESHOOTING & REPAIR | |||||
| Observe all Safety Guidelines detailed throughout this manual | |||||
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| PROBLEMS |
| POSSIBLE AREAS OF |
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| (SYMPTOMS) |
| MISADJUSTMENTS(S) |
| COURSE OF ACTION | |
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| FUNCTION PROBLEMS |
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| The circuit breaker trips after the | 1. Check to make sure there are not | 1. | Perform the DC Power Supply | ||
| wire has been feeding for a period of | any mechanical restrictions in the |
| Test. |
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| time. Welding is normal. |
| wire feeding path which could |
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| cause excessive loading on the | 2. | Perform the Wire Drive Motor | |
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| wire drive motor. |
| Test. | |
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| 3. The power board may be faulty. | ||
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| The 1/8 amp fuse on the voltage | 1. Check to make sure the PC | 1. Remove the input power to the | |||
| board repeatedly fails. |
| boards are NOT grounded to the |
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| case of the |
| fuse. Locate and remove the #21 | |
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| pen due to metallic dust |
| and #67 leads from the TS1 ter- | |
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| minal strip. | |
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| A. Make a resistance check |
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| from the following leads |
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| to the |
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| ing screw. Lead #510A, |
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| 510P, 500, 515 and 525. |
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| B. The resistances should |
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| be above 1000 ohms. If |
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| any tests are below 1000 |
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| ohms that circuit has low |
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| resistance to case |
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| ground. Isolate faulty |
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| leads or PC board. See |
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| wiring diagram and |
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| schematic. |
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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
