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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) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| WELDING PROBLEMS |
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Poor welding, weld settings drift, or 1. | Make sure the machine settings | 1. | Check the operation of the mode | |||
output power is low. | are correct for the weld process |
| switch (S2) and the associated | |||
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| being used. |
| circuitry. See wiring diagram. |
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| 2. | Check machine performance on | 2. | Check for loose or faulty connec- | ||
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| LOCAL control. If OK then the |
| tions in the heavy current carrying | |
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| remote control device may be |
| leads (i,e,. output diodes, output | |
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| faulty. Check or replace. |
| terminals, shunt and main trans- | |
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| former.) |
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| 3. Check the input voltages and |
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| input voltage reconnect | 3. | Perform Output Diode Test. |
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| procedures. See Installation |
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| Section of this manual. | 4. | Perform Control Board Voltage | |
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| Test. |
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Poor stick electrode welding | 1. | Check for loose or faulty welding |
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performance. The arc pops out. |
| cables. | 1. | Check for loose or faulty connec- |
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| tions in the heavy current carrying |
| 2. | Is the electrode DRY? Try weld- |
| leads (i,e,. output diodes, output |
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| ing with another electrode from a |
| terminals, shunt and main trans- |
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| different container. Make sure |
| former.) |
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| you have the correct electrode for |
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| the application. | 2. | Perform Output Diode Test. |
| 3. | Make sure the machine settings | 3. | Perform Control Board Voltage |
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| are correct for the weld process |
| Test. |
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| being used. |
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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
