Westerbeke 6.5 MCG Service Manual page 65

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