Onan MDKBH Series, Service Manual

Page: 72 / 90

11-1
11. Troubleshooting
To troubleshoot the genset use TABLE 11-1.
TROUBLESHOOTING GENSET FAULTS in con-
junction with the
e- Series Digital Display or blinking
of the control switch status lamp. Perform the step-
by-step corrective actions suggested.
Note: Many genset shutdowns can be avoided by
performing periodic maintenance on schedule
(TABLE 4-1. PERIODIC MAINTENANCE SCHEDULE)
and by
not running the genset out of fuel. Note that
when gensets and propulsion engines draw from the
same fuel tanks, the fuel dip tubes are usually ar-
ranged so that the gensets run out of fuel first. By
marking the genset empty points on the fuel gauges,
it will be easier to tell when to stop the gensets before
running them out of fuel.
TROUBLESHOOTING WITH DIGITAL
DISPLAY
If a fault shutdown occurs the ALARM status lamp
on the
e- Series Digital Display will blink and the LCD
screen will display the Fault Number, a description
of the Fault and the hour in total genset running time
when the Fault occurred (Figure 2-4).
The fault will be displayed indefinitely. Touch any
button to clear the fault. The display will turn off in
5 minutes after the fault has been cleared.
See Page 2-5 to display any of the last five faults in
fault history.
TROUBLESHOOTING WITH STATUS LAMP
If a fault shutdown occurs, the amber status lamp on
the control switch will repeatedly blink sets of 3 , 4 , 5
or 7 blinks.
•
One blink indicates shutdown due to high en-
gine temperature.
• Two blinks indicate shutdown due to low oil
pressure.
• Three blinks indicate a service fault. Press
Stop once to cause the two-digit shutdown
code to blink. (Pressing Stop again will stop the
blinking.) The two-digit code consists of 1 to 7
blinks, a brief pause, and then 1 to 9 blinks. The
first set of blinks represents the tens digit and
the second set of blinks the units digit of the
shutdown code number. For example, Shut-
Down Code No. 36 appears as:
blink – blink – blink — pause — blink – blink
– blink – blink – blink – blink — long pause
— repeat
.
• Four blinks indicate shutdown due to a failure
to start within the time allowed for cranking.
• Five blinks indicate shutdown due to high lev-
els of Carbon Monoxide (CO) in the vessel.
•
Seven blinks indicate shutdown due to a loss
of raw water flow for engine and exhaust cool-
ing.
The fault code stops blinking after five minutes.
Press Stop three times within three seconds to re-
store fault code blinking.
Note: The last fault logged will blink even though the
condition that caused the shutdown may have been
corrected.
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