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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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| FUNCTION PROBLEMS |
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Machine display reads “Error | 1. | Make certain the overlay is | 1. | Perform the Sensor |
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Invalid Overlay,” or it displays an |
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| Calibration Test. |
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invalid ID number on | 2. Inspect the infrared sensors on |
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| the front panel. If they are |
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| dirty, blow them out with low |
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| pressure air and clean with a |
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| soft cloth. |
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| 3. Inspect for damage to the Bar |
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| Code(s) (black squares) on the |
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| back of the overlay. Also |
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| check for dirt |
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| of overlay. Wipe off with a soft |
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| rag. |
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Machine displays “ERROR: S.L. | 1. | Contact your local Lincoln | 1. | Perform the Serial Loop |
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NOT INITIALIZED” on |
| Authorized Field Service |
| Wiring Harness Test. |
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| Facility for technical assis- | 2. The control board may be |
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| tance. |
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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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| 3. The display board may be |
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| faulty. Replace and perform |
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| voltage calibration. |
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| 4. The power board may be |
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| faulty. Replace. |
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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-
