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TROUBLESHOOTING & REPAIR |
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TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual |
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PROBLEMS |
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| POSSIBLE AREAS OF |
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(SYMPTOMS) |
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| MISADJUSTMENTS(S) |
| COURSE OF ACTION | |||
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| FUNCTION PROBLEMS |
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No control of arc voltage. Wire feed- | 1. | The Arc Voltage Control poten- | 1. | The Arc Voltage Control poten- | ||||
ing is normal. |
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| tiometer may be dirty. | Rotate |
| tiometer may be faulty. Check or | ||
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| several times and check if prob- |
| replace. See Wiring Diagram. | |||
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| lem is resolved. |
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| 2. | Perform the | SCR Rectifier | |
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| Assembly Test. |
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| 3. | The control board may be faulty. | ||
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| Replace. |
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There is no gas flow when gun trig- | 1. | Check gas source and hoses for | 1. | Check the gas solenoid by dis- | ||||
ger is pulled. Wire feeds and weld |
| leaks or kinks. |
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| connecting it from the control | |||
voltage is present. |
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| board (Plug J8) and applying a | ||
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| 2. | If Spool Gun adaptor is not |
| 12 VDC external supply to the | |||
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| installed make certain | jumper |
| gas solenoid. | If the | solenoid |
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| plug is installed in plug J20. See |
| does NOT activate then it may | |||
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| Wiring Diagram. |
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| be faulty. Replace. |
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| 2. | The control broad may be faulty. | ||
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| Replace. |
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The machine stops feeding wire | 1. | Check for mechanical restric- | 1. | Check the motor armature cur- | ||||
while welding. |
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| tions in the wire feeding path. |
| rent. Normal armature current is | |||
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| The gun may be clogged. |
| 1.75 amps maximum. | If the | ||
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| motor armature current is normal | ||
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| the control board may be faulty. | ||
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| Replace. |
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| 2. | If the motor armature current is | ||
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| high (2 to 2.5 amps) and there | ||
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| are NO restrictions in the wire | ||
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| feeding path then the motor or | ||
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| gear box may be defective. | ||
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| Replace. |
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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, con- tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call 216-