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Dayton professional-duty electric generators – Dayton 3WY47 User Manual

Page 18

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Dayton Operating Instructions and Parts Manual

3WY47, 3W735B, 3W736C, 3WY44, 3TE27A, 3WY45, and 3WY46

18

Dayton Professional-Duty
Electric Generators

®

Troubleshooting Chart

NOTE: See engine owner’s manual for
engine troubleshooting.

Only a qualified
electrical service

person should service and repair
generator. Use only factory approved
repair parts.

Corrective Action

1. Fill tank with fresh fuel

2. Fill engine crankcase with oil to the full

mark on dip stick

1. Replace capacitor

2. Check resistance of coils (see “Electrical

Component Specifications,” page 2)

3. Replace both diodes on rotor

4. Apply 12-volt battery to capacitor

terminals for 2-3 seconds

1. Set engine speed to 3720 RPM (62 Hz)

with no load

2. Replace both diodes on rotor

3. Check resistance of coils (see “Electrical

Component Specifications,” page 2)

4. Replace capacitor

Set engine speed to 3720 RPM (62 Hz)
with no load

1. Replace both diodes on rotor

2. Do not overload generator

3. Contact an authorized engine service

center

Symptom

Engine will not start

No voltage when starting
generator with no electrical
load

Voltage is less than normal
voltage with no electrical load

Voltmeter reading more than
10% high with no electrical
load

Voltmeter reading correct with
no electrical load, but more
than 10% low when electrical
load is added

Possible Cause(s)

1. Insufficient fuel

2. Oil level low

1. Defective capacitor

2. Winding short circuit or loose

connections

3. Defective rotor diode

4. Loss of residual magnetism

1. Engine speed too low

2. Defective rotor diode

3. Partial short circuit in winding

4. Defective capacitor

Engine speed too high

1. Defective rotor diode

2. Electrical load too high

3. Engine not running properly

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