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| TROUBLESHOOTING AND 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 (Continued) |
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| The wire feed speed cannot be | 1. | If the | 1. | Check for loose connections |
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| controlled. The motor runs and |
| merged arc welding with the vari- |
| between the speed control, the |
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| feeds wire but the speed cannot |
| able voltage board switch in the |
| control board, and the variable |
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| be changed regardless of control |
| VV position, change it to the CV |
| voltage board. See wiring |
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| setting. |
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| position. If proper motor speed |
| diagram. |
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| control returns, the variable volt- |
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| age board may be faulty. | 2. | Check the speed control rheostat |
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| for proper operation. Normal |
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| resistance is 5000 ohms. |
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| 3. | Perform the Drive Motor Test. |
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| 4. | The control board may be faulty. |
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| The wire feed “coasts” when the | 1. | Make sure the gun trigger is not | 1. | Perform the 1CR Relay Test. |
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| gun trigger is released. |
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| “sticking”. |
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| The wire feeds normally and welds | 1. | Check or replace the solenoid. | 1. | With the gun trigger activated, |
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| but the solenoid is not operating. |
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| check for the presence of |
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| 115VAC at terminals 32A and 7. |
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| If the proper voltage is present, |
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| the solenoid may be faulty. If the |
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| correct voltage (115VAC) is NOT |
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| present, the relay board may be |
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| faulty. |
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| When the gun trigger is activated | 1. | Check wire feed direction switch | 1. | The 1CR relay may be faulty. |
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| the wire “backs up” instead of feed- |
| for proper direction and operation. |
| Check or replace. |
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| ing forward. |
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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
