Installation manual
PROBLEM
ELECTRICAL
TROUBLESHOOTING
CHART
The following test procedures will require the use
of
a multimeter
and
the
engine's wiring diagram (in this manual). Also refer to the relay testing
page. WESTERBEKE recommends that these tests be perfonned by a
qualified technician.
TESTING
INSPECTION/SOLUTION
(12
VDC
is
battery+
voltage
measured
to
ground)
Engine
cranks
but
fails
to
start
...
Test
for
B+
(12v)
at
terminals
30
and
86
on
the
K2
run
relay
Check
for
bad
connections
at
both
terminals.
Replace
the
K2
relay.
If
OK
..,a..
Test
for
B+
(12v)
at
run
relay
K2,
terminal
85
and
activate
the
start
switch.
Voltage
should
be
less
than
5
volts.
If
OK
..,a..
Activate
the
start
switch,
test
for
B+(12v)
at
relay
K2
run
relay,
terminal
87.
Inspect
the
connections
at
relay
K2,
terminal
85,
or
at
the
ECU
connector
J2,
pin
19.
Replace
the
K2
relay.
NOTE:
For
ot~er
possible causes (failure to start) such as fuel pump, speed sensor (MPU),
ignition, etc, refer to the these sections in this manual.
Engine
starts,
runs
but
shuts
down
.....
Test
for
voltage
across
the
oil
pressure
sensor
terminals,
with
the
engine
running
voltage
should
be
less
than
1.0
volts.
If
OK
..,a..
Test
for
voltage
across
the
exhaust
temperature
switch,
when
the
engine
shuts
down,
it
should
read
zero
(0)
volts.
If
OK
..,a..
The
engine
temperature
sensor
maybe
faulty.
If
OK
..,a..
Fireboy
suppression
circuit
maybe
faulty.
IMPORTANT
Faulty
oil
pressure
sensor.
Replace
sensor/switch.
Faulty
exhaust
temperature
switch.
Replace
switch.
Loss
of
coolant
thru
exhaust
elbow.
High
exhaust
temperature.
Test
sensor,
refer
to
component
testing
in
this
manual.
By-pass
Fireboy
connection
at
terminal
block.
Install
a
jumper
between
#4
and
#3.
SYSTEM
MONITORING
SOFTWARE
AND
DATA
LOGGING
Software, at no charge. is available through your area Master Distributor. The Master Distributor for your area can be
located on the Westerbeke website at www.westerbeke.com.
An interconnect cable will need to be purchased (pn#
049998) to connect between the ECU (Electronic Control Unit)
in the generator's control box and your laptop to be able to use this software.
The software will be a very important tool for monitoring system operation to ensure the system is operating at its
optimum. Also for locating any operating issue and for the very important task
of
Data Logging used to help determine
a cause for engine/system malfunction. For the models listed in this manual, the engine MUST be running for the
software to communicate with the system
ECU. When troubleshooting an engine/system malfunction, start data
Logging as soon as the engine
is
started and running. Then view the data being displayed in the various boxes on the
PC Interface.
The Data file can be opened in most speadsheet forms such as Microsoft Excel.
30