TROUBLESHOOTING | ||
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| Observe all Safety Guidelines detailed throughout this manual |
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MACHINE TROUBLESHOOTING GUIDE
Not all trouble conditions can be recognized by the PC board, and displayed as error codes. The following guide covers most other trouble conditions.
| PROBLEMS |
| POSSIBLE AREAS OF |
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| RECOMMENDED |
| (SYMPTOMS) |
| MISADJUSTMENTS(S) |
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| COURSE OF ACTION |
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| PROBLEMS |
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| Machine has no output. | 1. | Secondary contactor circuit (2 | 1. Check 2 and 4 circuit wiring. | ||
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| and 4 wire feeder receptacle) not |
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| working. |
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| 2. | Electrode or work lead loose or | 2. | Repair connection. | |
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| broken. |
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| 3. | Defective PC Board. | 3. | See PC Board Troubleshooting | |
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| Procedure. | |
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| 4. | Protective circuits operating due | 4. | Turn power off. Remove output short | |
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| to output short circuit. |
| circuit. | |
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| 5. | If using an | 5. | Check for continuity between pins C | |
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| plug kit not making connection |
| & D in the K484. | |
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| between 2 & 4 in wire feeder |
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| receptacle. |
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| 6. | If welding with 1/16" aluminum | 6. | a) | Turn power off to clear error. Use |
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| wire and machine is flashing E00. |
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| recommended wfs, voltage set- |
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| tings and angle of approach of |
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| wire to work. |
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| b) | If problem still persists, call Local Lincoln |
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| Authorized Field Service Facility. |
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| Machine has minimum output and no | 1. | Voltage Control misconnected. | 1. | Voltage Control wiring. | |
| control. |
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| Machine has low output and no con- | 1. | Open in feedback circuitry. | 1. | Check wiring and control and PC | |
| trol. |
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| board wiring harness plugs. | |
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| 2. | Faulty PC Board. | 2. | See PC Board Troubleshooting | |
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| Procedure. | |
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| 3. | Voltage Adjust potentiometer | 3. | Check and replace potentiometer if | |
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| circuit open (lead 75). |
| faulty. Check wiring of lead #75. | ||
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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 your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.