Dayton Operating Instructions and Parts Manual
Model 4W315C
Troubleshooting Chart
NOTE: See engine owner’s manual for engine troubleshooting.
Symptom
Only a qualified electrical service
person should service and repair generator. Use only factory approved replacement parts.
Possible Cause(s) | Corrective Action |
No voltage when starting generator with | 1. Defective capacitor | 1. Replace capacitor |
no electrical load | 2. Winding short circuit or loose connec- | 2. Check resistance of coils (See “Electrical |
| tions | Component Specifications,” page 2) |
| 3. Defective rotor diode | 3. Replace both diodes on rotor |
| 4. Loss of residual magnetism | 4. Apply |
|
| terminals for |
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Voltage is less than normal voltage with | 1. Engine speed too low | 1. Set engine speed to 3720 RPM (62 Hz) |
no electrical load |
| with no load |
| 2. Clogged spark arrester | 2. Clean arrester. See engine owner’s |
|
| manual |
| 3. Defective rotor diode | 3. Replace both diodes on rotor |
| 4. Partial short circuit in winding | 4. Check resistance of coils (See “Electrical |
|
| Component Specifications,” page 2) |
| 5. Defective capacitor | 5. Replace capacitor |
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Voltmeter reading more than 10% high | Engine speed too high | Set engine speed to 3720 RPM (62 Hz) |
with no electrical load |
| with no load |
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|
Voltmeter reading correct with no | 1. Defective rotor diode | 1. Replace both diodes on rotor |
electrical load, but more than 10% low | 2. Electrical load too high | 2. Do not overload generator |
when electrical load is added | 3. Engine not running properly | 3. Contact an authorized engine service |
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| center |
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Engine will not start | 1. Fuel level too low | 1. Add fuel to fuel tank |
| 2. Fuel cock not in “O” (open) position | 2. Move fuel cock to “O” (open) position |
| 3. Diesel fuel not reaching the fuel | 3. See qualified Yanmar service person |
| injection pump or nozzle |
|
| 4. Speed control lever not in START | 4. Move speed control lever to START |
| position | position |
| 5. Lube oil level not correct | 5. Add lube oil to engine |
| 6. Fuel injection nozzle not working right | 6. See qualified Yanmar service person |
| 7. Recoil starter not pulled quickly and | 7. When starting engine with recoil starter, |
| firmly enough | pull starter rope quickly and firmly. You |
|
| must pull starter rope all the way out |
| 8. Spark arrester clogged by carbon | 8. Clean spark arrester. See “Cleaning the |
|
| Spark Arrester,” page 16 |
| 9. Battery not discharging | 9. Loose battery connections, corrosion on |
|
| battery terminals, or battery dead |
107358 |
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| 19 |
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Version B - For Reduction | G016.J |
