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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 | ||||
(SYMPTOMS) | MISADJUSTMENT(S) |
| COURSE OF ACTION | |||
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| OUTPUT PROBLEMS |
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The output terminals are always | 1. Make | certain | the | Output | 1. Check for an internal short | |
electrically “hot.” | Terminals switch (S3) is in the | between leads #2 and #4. See | ||||
| “REMOTE” position. |
| Wiring Diagram. | |||
| 2. Remove any external leads | 2. Check the Output Terminals | ||||
| hooked to the 14 pin amphenol | switch (S3) for proper opera- | ||||
| and/or the terminal strip. If the | tion. | Also check associated | |||
| problem disappears, the fault is | leads. See Wiring Diagram. | ||||
| in the | control | cable | or wire | 3. Remove plug P3 (SCR gate | |
| feeder. |
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| leads) from the control board. If | ||
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| the | problem disappears, the |
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| control board may be faulty. | |
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| Replace. If the output terminals | |
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| are still electrically “hot,” per- | |
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| form the SCR/Diode Rectifier | |
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| Bridge Test. | |
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| 4. The snubber board may be | |
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| leaky. Check or 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
IDEALARC
LINCOLN ®
ELECTRIC