DCA-70USJ —TROUBLESHOOTING (GENERATOR)
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, use Table 18 shown below for diagnosis of the Generator. If the problem cannot be remedied, consult our company's business office or service plant.
TABLE 18. GENERATOR TROUBLESHOOTING
SYMPTOM | POSSIBLE PROBLEM | SOLUTION |
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No Voltage Output | AC Voltmeter defective? | Check output voltage using a voltmeter. |
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| Is wiring connection loose? | Check wiring and repair. |
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| Is AVR defective? | Replace if necessary. |
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| Defective Rotating Rectifier? | Check and replace. |
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| Defective Exciter Field? | Check for 17.3 ohms across J & K on CN1 |
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Low Voltage Output | Is engine speed correct? | Turn engine throttle lever to "High". |
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| Is wiring connections loose? | Check wiring and repair. |
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| Defective AVR? | Replace if necessary. |
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High Voltage Output | Is wiring connections loose? | Check wiring and repair. |
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| Defective AVR? | Replace if necessary. |
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Circuit Breaker Tripped | Short Circuit in load? | Check load and repair. |
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| Over current? | Confirm load requirements and reduce. |
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| Defective circuit breaker? | Check and replace. |
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| Over current Relay actuated? | Confirm load requirement and replace. |
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