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7.6KW BT GENERATOR TROUBLESHOOTING
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NOTE:
WESTERBEKE recommends that the following generator tests
and adjustments bepeiformed by a qualified technician.
The
followin~,troubleshooting
chart is designed
~o
give
insight into prqblems·which may be encountered with the
BT bnishiess generators operating on compound transformer
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 90vered in the text of this manual.
Keep in mind that a basic fundarnehtal 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
These are hand tools: an arnprobe and a quality volt oinn
meter capable of reading less than one oinn 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 tn
the
method of operation rather than an
equipment fault. Bring basic repair tools with you on the
initial trip yo he problem equipment, such as giodes and a
bridge rectijier, so that if theproblem should be found in
one of these easily replaceable parts, the problem cab be
remedied early and efficiently.
a generator.
Only a few basic tools are necessary for diagnosis and repair.
. TROUBLESHOOTING
CHART
NOTE:
Refer to the INTERNAL WIRING DIAGRAMS when peiforming the following tests.
Troubleshaot the components in the
f~llowin.g
.. ,!rder.
1. LOW VOLTAGE<6~ 100
VOLTSAG
. ·COMPONENT CHECKS: .
' .
. B
ROTOR COMPONENTS' ....
82. EXCITER ROTOR DIODES
\. 83. ROTOR FIELD ViliNDING .
81. EXCITER ROTOR WINDING(S)
a,b,c.
A
..
EXCITER STATOR WINDIN.G
2. NO AC
VOLTAGE OUTPUT
. .
MAIN STATOR, ROTOR COMPONENTS, TRANSFORMER
COMPONENT CHECKS: .
.
. .
C
1+2 MAIN STATOirWINDING
B
4 POSIRESISTOROO·
.'
.
B
2 DlODI=5(4-6 OPEN/SHORTED)
D
1+2 COMPOUND TRANSFORMER WINDING
B
.3ROTOA.FIELDWINDING
3. RESIDUAL VOLTAGE
ExCITER CIRCUIT FAULTY
. COMpONENT CHECKS:'
.
A
1~1+2 EXCITER STATOR WINDING(S)
G
8RIDGE RECTIFIER
.
D
3 TRANSFORMER AUX. WINDING
C
3 .MAIN STATOR AUX. WINDING
NOTE:
Reference the BT Troubleshooting guides on WESTERBEKE'S website under "TECHNICAL" for
additional information. WWWWESTERBEKE.COM.
Engines & Generalors
37
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Troubleshooting
