Westerbeke 6.5 MCG Service Manual page 63

SOFTWARE DIAGNOSTICS
ENGINE WARNINGS RUN STATE:
DC circuit breaker on, generator successfully started
and running.
In the RUN state, all warnings are logged and a light will be illuminated on the control panel. The light(s) will go out when the
warning condition is no longer present. Warnings will be indicated as follows:
Oil Pressure warnings illuminate the
OIL PRESSURE
light.
Engine Coolant Temperature warnings illuminate the
ENGINE TEMP
light.
Exhaust Temperature High illuminates the
EXHAUST TEMP
light.
External Alarm warning illuminates the
EXT ALARM
light.
Overspeed and Underspeed warnings illuminate the pair of
SPEED
lights.
All other warnings illuminate the pair of
CHECK ENGINE
lights.
WARNING/DESCRIPTION PROBLEM
PROBABLE CAUSE
Coolant Temperature Low Reading less than -25°C (-13° F)
1. Excessively cold ambient.
2. Faulty temperature sensor.
Coolant Temperature High Reading more than 95"C (203° F) 1. Faulty temperature sensor.
2. Cooling water issue (raw water or coolant).
3. Thermostat.
4. Engine heat soak after normal shutdown.
Underspeed 60 Hz: Under 1656 rpm for 8+ seconds 1. Excessive load on generator.
50 Hz: Under 1380 rpm for 8+ seconds
2.
Air intake blocked.
3. Fuel supply insufficient.
Overs peed 60 Hz: Over 1944 rpm for 4+ seconds 1. Vacuum leak in intake manifold or hoses.
50 Hz: Over 1620 rpm for 4+ seconds 2. Throttle shaft sticking.
3. Stepper unplugged.
Overload Throttle wide open and RPM 1800 (60Hz) 1. Excesive load on generator.
for 1500 (50Hz) for 8+ seconds.
Crank Sensor Possible Fault Internal ECU parameter. 1. Loose connection or corroded wiring.
2. Needs adjustment.
3. Sensor tip contaminated with metal filings.
4. Faulty sensor.
Oil Pressure Sender Shorted Short circuit (0 ohms) 1. Faulty oil pressure sender.
2. Pinched or shorted wire in harness.
Oil Pressure Sender Open Open circuit (rn ohms) 1. Faulty oil pressure sender.
2. Loose connection or corroded wiring.
Oil Pressure Low
Reading less than 12 psi for 5 seconds.
1.
Check oil level.
2. Insure proper oil viscosity.
3. Check lubrication system for leaks.
Battery Voltage low Less than 12 volts 1. Dead battery.
2. Blown fuse.
3. Faulty regulator or charging circuit.
4. Loose connection or corroded wiring.
Battery Voltage High More than 15.5 volts
1. Faulty regulator or charging circuit.
Ambient Air Temperature Shorted Short circuit (0 Ohms)
1. Faulty temperature sensor.
2. Pinched or bare wire in harness.
Ambient Air Temperature Opened Open circuit 1. Faulty air temperature sensor.
2. Loose connection or corroded wiring.
Ambient Air Temperature Low Reading more than -25°C ( -13° F) 1. Excessively cold ambient.
2. Faulty air temperature sensor.
Ambient Air Temperature High Reading more than 95°C (203° F) 1. Excessively hot ambient.
2. Bilge venting system faulty or inadequate.
3. Faulty temperature sensor.
Engines
&
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