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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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| OUTPUT PROBLEMS |
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| Machine has no output – no fans | 1. | Check for proper input voltage | 1. | Perform the Input Power and |
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| – no display. Main input fuses are |
| connections. |
| Wiring Harness Test. |
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| open indicating excessive input | 2. | Make certain the reconnect | 2. | Perform the Input Rectifier |
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| current draw. |
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| panel is configured properly for |
| Test. |
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| the applied voltage. | 3. | Perform the Reconnect |
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| 3. | Replace the input fuses with |
| Switch Test #1. |
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| proper size and ratings. | 4. Perform the Switch Board |
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| Test. |
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| 5. Perform the Snubber and |
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| Bleeder Resistor Test. |
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| Machine has no output – no dis- | 1. | Check circuit breaker (5 amp) | 1. | Perform the Auxiliary |
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| play – fans run. |
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| Transformer Test #1. |
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| Reset if necessary. | 2. Perform the Internal and |
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| Auxiliary Supply Voltage Test. |
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| Machine has no output – fans run | 1. | Check for loose or faulty con- | 1. | Replace the Power P.C. Board. |
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| - Display flashes On and Off |
| nections at the Power P.C. |
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| repeatedly. |
| Board. See Wiring Diagram. |
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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-
