ON·BOARD
DIAGNOSTICS
1
PC
INTERFACE
SOFTWARE
ENGINE
CONTROL
STATES
This
section
monitors
the
control conditions of
the
genset.
Emission
Conditions
There
are
four
Emission
Conditions.
1.
Closed Loop Disabled - This condition
will
display
if
the
Wideband
02
Sensor Control
has
been disabled
2. Nonnal Operation - This condition
will
display
when
the
engine
is
running
and
everything
is
operating prop-
erly.
3.
Sensor
Out
Of
Range -This condition
will
display
when
the
lambda
is
extemely rich
{less
than
0.8)
or
very
lean
(greater
than
4.6)
..
4.
Not
Crossing Stoich - This condition
will
display
if the
engine
has
been
running
too
Rich
or
too
lean
for
more
than
the
allotted
time
period. A perfect Stoich
reading
in
the
display
is
1.000.
Heater Malfunction -This condition
will
display
if
the
heater
on
the
Wideband
02
Sensor
has
failed
..
If
this
condition
displays
it
is
probably time
to
change
the
Wideband
02
Sensor.
Engine
Shutdowns
Along
with
the
PC
Interface
to
display shutdowns,
the
Genset
is
equipped
with
an
LCD
display
to
indicate
shut-
down.
Refer
to
your
Owners
Manual for a description of
the
display.
When
the
Genset
is
operational
and
everything
-is
operating
properly,
this
box
will
display
Normal
Conditions.
There
are
ten
Engine Shutdowns that are controlled
by
the
ECU.
1.
Over-Crank Timeout - This
will
display if after
the
start
button
is
pressed
and
the starter motor
is
cranking
the
engine
but it
does
not start
the
engine
in
about
six
seconds.
2.
High Engine Coolant Temperature - This
will
display
if
the
temperature
of
the
engine coolant
exceeds
95•C.
3.
Overspeed •
This
will
display if
the
engine speed
exceeds
20%
of
the
desired set speed.
(2160
rpm
for
60Hz
and
1800
rpm
for
50Hz).
4.
Underspeed -
This
will display
if
the engine
speed
falls
below
20%
of
the
desired
set
speed.
(
1440
rpm
for
60Hz
and
1200rpm
for
50Hz).
5.
Speed Loss -
Thi~
will
display
if
there
is
a
loss
of speed
signal
due
to
a sensor failure or the engine
has
stopped
running
due
to
some
other malfunction not covered
under
the
ECU
shutdowns.
Sometimes if the Genset
runs out
of
fuel this shutdown
or
Low
Oil Pressure
may be displayed.
6.
High Exhaust Temperature -This
will
display
if the
exhaust
elbow
overheats
due
to
a lack of
raw
water
dis-
charge.
Check the raw water
pump
for
flow if this failure
occurs.
7. Low Oil Pressure - This
will
display
if
the
oil
pressure
falls
below 8
psi.
8.
' Oil Pressure Sensor Shorted -
This
will
display
if
there
is
a short in
the
oil pressure sensor
wire.
9.
External Fault -This
will
display
if
the
device
connected
to
the auxiliary fault
terminal
such
as
a
fire
boy device
has
been triggered.
10.
Low Battery
LeYel
on
Crank
-This
will
display
if
the
battery voltage
is
too
low
to
crank
the
engine
long
enough
to
start.
Engine
State
There
are
five
Engine
States.
1.
Idle - This is the state
when
the
engine
is
turned
off
..
2.
Crank-
This
is
the
state
when
the
starter
motor
is
engaged
and
cranking the engine over for starting.
3.
Run - This is the state
when
the
engine
is
running.
4.
Shutdown - This
is
the
state after the
stop
button
has
been pressed and
the
engine
is
shutting
down.
5.
Idle Wait - This is a short period,
approximately
3
sec-
onds,
after the stop button
has
been pressed before
the
start button can be pressed
again.
This
allows
the
engine
to
stop turning
before'
attempting a
restart.
Firmware
Revision
Number
The Firmware Revision Number consists of
three
parts.
The
first
part
is
the
Part
Number,
the
second part
is
the
Major
Revision
Number,
and
the
third part
is
the
Major
Revision
Number.
NOTE:
When requesting service information, please reference
the complete Firmware Revision Number.
Frequency
Option
This
box
displays the position of
the
Frequency
Option
Switch on the ECU.
On
the
top
of the ECU
there
is
a
four
position
dip
switch
block.
Switch
Number
1
is
for
selecting
the
desired engine
speed.
When
the
switch
is
in
the ON
posi-
tion,
the
engine
will
run
at
1500
rpm
for
50Hz
operation.
When
the switch
is
in
the
OFF position,
the
engine
will
run
at
1800
rpm for 60Hz operation.
NOTE:
To
change the speed selection, the engine must be
OFF
and the Main
DC
Circuit Breaker on the panel box
must be switched OFF. When switching from one frequency
to another, there are wiring changes that must be performed
before operating the Genset. See you Owner's Manual
for
further details.
I,.,.IWESTERBEKE
l Engines & Glflnerators
63
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