Bt Generator Troubleshooting Chart - Westerbeke 8.0KW - 60Hz EDT Operator's Manual

BT GENERATOR TROUBLESHOOTING CHART
NOTE:
WESTERBEKE recommends that the following gen.erator tests
and adjustments be peiformed by a qualified technician.
The following troubleshooting chart is desigoed to give
insight into problems which may be encountered with the
BT bmshIess generators operating on compound traosfonner
regulation. Owing to the simplicity of the equipment and
controls, troubleshooting is relatively easy, once the
relationship between cause and effect is understood. Most
potential problems are covered in the text of this manual.
Keep in mind that a basic fundamental knowledge of
electricity is required for this troubleshoting, and always
remember that lethal voltages are present in the circuitry:
therefore, extreme cautin is essential when troubleshooting
a generator.
Only a few basic tools are necessary for diagoosis and repaiJ:
These are haod tools: an amprobe and a quality volt ohm
meter capable of reading less than one ohm due to the
preciSion required in reading component winding resistances.
Before attempting any repairs, get a clear explanation of the
problem, 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 'an
equipment fault. Bring basic repair tools with you on the
iIiitial trip yo he problem equipment, such as giodes and a
bridge rectifier, so that if theproblem should be found in
one of these easily replaceable parts, the problem cab be
remedied early and efficiently.
NOTE:
Refer to the INTERNAL WIRING DIAGRAMS when peiforming the following tests.
Troubleshoot the components in the following order.
1. LOW VOLTAGE 60·100 VOLTS AC
Component Checks
F Selector Switch
8 Rotor Components
82
Exciter Rotor Diodes
B3 Rotor Field Winding
B1
Exciter Rotor Winding(s) a,b,c
A 1-1+2 Exciter StatorWinding(s)
2. NO AC VOLTAGE OUTPUT
Main Stator, Rotor Components, Transformer
Component Checks
C
1+2 Main Stator Winding
B 4 Posi Resistor
8 2 Diodes (4-6 open/shorted)
o
1+2 compound Transfonner Winding
8 3 Rotor Field Wmding
3. RESIDUAL VOLTAGE
Exciter Circuit Faulty
Component Checks
A
1-1+2 Exciter Stator Winding(s)
G Bridge Rectifier
D 3 Transfonner Aux. Winding
C
3 Main Stator Aux. Wmding
F Selector Switch
Circuit Connections
(from the Transformer Aux. winding to the
connections on the Bridge Rectifier)
NOTE:
Reference the BTTroubleshooting guides on WESTERBEKE'S website under "TECHANICAL" for
additional information. www.WESTERBEKE.COM.
~
WESTERBEKE
Engine~
&
Generators
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