GN356402AC and GN356502AC
Troubleshooting Chart
| Symptom | Possible Cause(s) | Corrective Action |
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| Zero output from receptacles | 1. Engine speed is too slow | 1. | Adjust engine speed ✽ | ||
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| 2. | Open, shorted, or incorrect wiring | 2. | Referring to the wiring diagram, clean | |
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| and reconnect all wiring ✽ | |
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| 3. | Faulty capacitor | 3. | Replace capacitor ✽ | |
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| 4. | Open/shorted rotor or stator windings | 4. | Test winding resistance, replace winding | |
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| if necessary ✽ | |
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| 5. | Open rectifier | 5. | Test rectifier, replace if necessary ✽ | |
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| Low output voltage with no load |
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| 6 Vac or above | 1. Engine speed is too slow | 1. | Adjust engine speed ✽ | ||
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| 2. | Open rectifier | 2. | Test rectifier, replace if necessary ✽ | |
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| 3. | Faulty capacitor | 3. | Replace capacitor ✽ | |
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| 4. | Open/shorted rotor or stator windings | 4. | Test winding resistance, replace winding | |
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| if necessary ✽ | |
| Below 6 Vac | 1. Generator head not magnetized | 1. | |||
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| High output voltage with no load | 1. Faulty capacitor | 1. | Replace capacitor ✽ | ||
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| 2. | Engine speed is too fast | 2. | Adjust engine speed ✽ | |
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| Low output voltage under load | 1. Open rectifier | 1. | Test rectifier, replace if necessary ✽ | ||
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| 2. | Engine speed too slow at full load | 2. | Adjust engine speed ✽ | |
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| 3. | Excessive load applied | 3. | Reduce the applied load | |
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| Erratic output voltage | 1. Surging engine | 1. | Refer to engine manual | ||
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| 2. | Dirty, corroded, or loose wiring | 2. | Referring to the wiring diagram, clean | |
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| connection |
| and reconnect all wiring ✽ | |
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| 3. | Unbalanced load applied | 3. | Remove all loads, then apply each one | |
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| individually to determine which one is | |
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| causing erratic function | |
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| Noisy operation | 1. Loose generator or engine bolt | 1. | Tighten all mountings | ||
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| 2. | Short circuit in generator field or load | 2. | Test winding resistance, replace field | |
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| winding if necessary✽ | |
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| Test load devices for shorts. Replace | |
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| defective load device. | |
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| 3. | Faulty bearing | 3. | Replace bearing | |
✽These diagnostic and repair procedures should be performed by an authorized service center.
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