Westerbeke 5.5 kw EDC 60 HZ Operator's Manual page 50

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5.5/5.0KW EDe GENERATOR TROUBLESHOOTING
The following troubleshooting chart is designed to give
insight into problems which may be encountered with the
single ahd dual capacitor Be brushless generators. Owing to
the simplicity of the equipment and controls, troubleshooting
is relatively easy, once the relationshlp between cause and
effect is ·understood.
Keep in mind that a basic fundamental knowledge of
electricity is required for this troubleshooting, and always
remember that lethal voltages are present in the circuitry;
therefore, extreme caution is essential when troubleshooting
a generator.
Only Ii few basic tools are necessary for diagnosis and repuir.
These are hand tools: an amp probe and a quality volt-ohm-
meter capable of reading less than one ohm due to the preci-
sion required in reading component winding resistances.
Problem Probable Cause
No AC Output.
1. Shorted stator.
2. Open stator.
3. Shorted diodes (two).
Residual voltage 4 - 6 VAC (Hot to N)
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1. Faulty capaCitor.
at NO·Load.
2. Open Exciter.
3. Shorted exciter.
4. Electrical connections faulty.
High AC Output at No-Load. 1. Faulty rotor winding.
2. Incorrect capacitor.
3., Incorrect hertz tap on capacitor.
Low AC Output 60·106V. 1. Faulty rotor winding.
2. Faulty diode.
3. Faulty capacito,
Voltage Orop Under Load or at No-Load. 1. Faulty diode ..
2. Faulty capacitor.
No Battery Charge/Low Battery Charge 1. Faulty bridge rectifier.
2. Faulty integral controiler ..
3. Blown fuse.
4. Faulty winding.
Before attempting any repairs, gel a clear an explanation of
the problem as possible, preferably from an individual
witnessing the problem. In some cases, this may bring to
light a problem which is related to the method of operation
rather than equipment fault.
Bring basic repair tools with you on the initial trip to the
problem equipment, such as: diodes and bridge rectifier, so
that if the problem should be found in one of these easily
replaceable parts, the problem can be remedied early and
efficiently.
VerilicationJRemedy
1. Check stator windings.
2. Check stator windings.
3. Check diodes on rotor.
1. Check capacitor.
2. Check exciter windings.
3. Check exciter windings.
4. Inspect/clean and tighten connections.
1. Correct connections.
2. Verify capaCitor rating.
3. Connect correct hertz tap.
1. Check rotor winding.
2. Check diodes.
3. Verify capaCitor rating.
1. Check/replace diode.
2. Verify capacitor ratings/replace.
1. Check rectifier diodes.
2. Troubleshoot controiler.
3. Inspect/replace 30 amp fuse.
4. Check charge circuit windings.
Unstable voltage output. 1. Electrical connections are faulty/loose. 1. Check/clear/tighten electrical connections.
Noisy Operation. 1. Faulty support bearing.
1. Inspect rear rotor carrier bearing:
2. Generator rotor connection
2. Inspect securify of rotor to flywheel.
to engine is loose.
112 AC Voltage Output 1. Faulty Exciter Circuit. 1. Check exciter circuit components.
2. Faulty Rotor. 2. Check rotor, diodes and windings.
Engines.
& Generators
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