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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
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| TROUBLESHOOTING GUIDE | ||
detailed in the beginning of this manual. |
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PROBLEMS | POSSIBLE AREAS OF | RECOMMENDED | ||||
(SYMPTOMS) | MISADJUSTMENT(S) | COURSE OF ACTION | ||||
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| ENGINE PROBLEMS |
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The engine cranks but will not start. | 1. | Check for adequate fuel supply. | 1. Check leads #274 & #240A at | |||
| 2. Make sure the fuel shut off valve | J50 (exciter voltage plug) for | ||||
| loose or | faulty | connections. | |||
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| is in the open position (lever is in | ||||
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| See the Wiring Diagram. | ||||
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| line with the hose). |
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| 3. The battery voltage may be too | 2. Perform | the | Shutdown | ||
| Solenoid Test. |
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| low. If it is less than 11VDC, |
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| charge or replace the battery. | 3. Check leads #224, #225, #240 | |||
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| Check the charging system. | and #262 for loose or faulty con- | |||
| 4. If the engine temperature light is | nections. | See | the Wiring | ||
| Diagram. |
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| lit, check the engine cooling sys- |
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| tem. |
| 4. Make sure the control board | ||
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| mounting/grounding screws are | ||
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| tight. |
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| 5. Check solenoid waveforms as | ||
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| illustrated | in the | Oscilloscope |
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| Waveforms Section. | ||
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| 6. Check to make sure that J4 & | ||
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| J23 are not swapped at the con- | ||
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| trol board. See the Wiring | ||
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| Diagram. |
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The engine shuts down shortly after | 1. | Check for adequate fuel supply. | 1. Perform | the | Shutdown | |
start. Initialize sequence is normal | 2. | If any indicator light is lit when | Solenoid Test. |
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(see Initialization Sequence sec- |
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| the engine shuts | down, that | 2. If possible check solenoid wave- | |||
tion). |
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| particular system | has faulted. | forms as illustrated in the | |||
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| Check system. |
| Oscilloscope Waveforms sec- | ||
| 3. Check for loose, faulty, or cor- | tion. |
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| roded battery cable connec- | 3. The control board may be faulty. | |||
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| tions. |
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| 4. Check the Run/Stop switch and |
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| associated leads for loose or |
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| faulty connections. |
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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-
