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| TROUBLESHOOTING & REPAIR |
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| TROUBLESHOOTING GUIDE | Observe Safety Guidelines | |
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| detailed in the beginning of this manual. | |
PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED |
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(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION |
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| WELDING PROBLEMS |
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For no apparent reason the weld | 1. | Check for proper wire feed | 1. | If zero arc voltage is displayed |
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characteristics have changed. |
| speed setting. In the |
| while welding, the voltage |
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| MIG/MAG and FCAW Modes, |
| sense leads may be broken. |
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| check for proper voltage set- |
| Check the following molex |
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| tings. In the MIG/MAG Pulse |
| plugs and associated wiring for |
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| Modes, check the arc length |
| loose or faulty connections: |
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| trim setting. These controls |
| J60, J62 on the snubber board |
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| are on the wire feeder. In the |
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| J20 on the control board |
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| Stick Mode, check for proper |
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| preset current setting. | 2. | Perform the Welding |
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| 2. Check for proper shielding gas |
| Feedback Test. |
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| and gas flow. | 3. | The control board may be |
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| 3. Check for loose or faulty weld- |
| faulty. Replace and perform |
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| voltage calibration and current |
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| ing cables. |
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| calibration. |
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The arc is “too hot,” and cannot | 1. | Perform the full voltage cali- | 1. | Check plugs J60, J62 and J20 |
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be adjusted. |
| bration. |
| for loose or faulty connections. |
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| See Wiring Diagram. |
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| 2. The snubber board may be |
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| faulty. Replace and perform |
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| full voltage calibration. |
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| 3. The control board may be |
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| faulty. Replace and perform |
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| voltage calibration and current |
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| calibration. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-
