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Return to Section TOC
Return to Section TOC
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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 |
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| (SYMPTOMS) |
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| MISADJUSTMENTS(S) |
| COURSE OF ACTION | |
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| FUNCTION PROBLEMS |
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| The set speed is adjustable and | 1. | Check that the jumper plug is | 1. | Remove the drive motor end cap | ||
| steady. The actual speed reading is |
| installed securely in the harness |
| and the tach cover plate from the | ||
| incorrect and or erratic. |
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| receptacle near the voltage |
| end of the wire drive motor. |
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| board. Codes below 8300 only. |
| Check to make sure the slotted | |
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| disc is secure and aligned and | |
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| 2. | Check for loose or faulty connec- |
| rotates freely through the center | |
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| tions on leads #510A, #525A and |
| of the module |
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| #555 between the tach receptacle |
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| and the control board. | 2. | Perform the Tach Board |
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| Feedback Test. |
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| 3. Check the tach cable from the |
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| tach board to the tach receptacle. | 3. | If the Tach Board Feedback | |
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| The shield in the cable should |
| Test is OK the control board may | |
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| NOT be grounded to the case. |
| be faulty. Replace. |
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| 1. | Check the voltage sensing leads | |
| The set volts and actual volts read- | 1. | Put the Lincoln power source in |
| for continuity. (zero ohms). #21 | ||
| ings match within a few tenths of a |
| the machine control mode. |
| should have continuity to the | ||
| volt while welding. However both |
| Check to see if the power supply |
| work piece and #67 should have | ||
| readings are inaccurate. |
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| can be set for the arc voltage |
| continuity to the wire feed head | |
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| required for the process. If not, |
| assembly. See wiring diagram. | |
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| the power source may be faulty. |
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| 2. | Perform the Voltmeter Accuracy | |
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| 2. | The control cable may be faulty. |
| Test. |
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| Check or replace. |
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| 3. | Perform the Meter Circuit |
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| Accuracy Test. |
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| 4. | The voltage board may be faulty. | |
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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
