Onan 50.0DDB-15R Series - Troubleshooting Engine Shutdown System

TABLE 3
TROUBLESHOOTING ENGINE SHUTDOWN SYSTEM
(Units with only one fault lamp)
SYMPTOM .
CORRECTIVE ACTION
1. Fault lamp lights and,engine
stops cranking after approx-
imately 75 seconds. . • .
1. See engine service manual for "
r
-
troubleshooting fuel system,
ignition system, etc. After
correcting problem, reset the
engine monitor by moving
run-stop/reset-remote switch to
reset position. Release and
return to run position.
2. Fault lamp lights immediately
after engine-starts. * " *
i •*
2. Check for: - M •*.-«* . —:
a. overspeed condition as engine •-•*
starts.
b. high temperature condition. ..:
c. faulty high engine temperature
sensor or overspeed switch. ^ ^>
d. faulty starter disconnect.
3. Fault lamp lights after engine
is running. . -
3. Check the following: . . -
» a. Oil level-engine will shut down.
after approximately 12-172'seconds
if low oil pressure sensor does
not open.
b. Oil pressure sensor may be
defective.
c. High engine temperature - caused
by low coolant level, faulty
thermostat, etc.
d. Faulty high engine temperature
sensor.
e. Faulty starter disconnect.
4. Fault lamp lights - no fault
condition exists.
4. Be certain that no fault condition ~
exists. Disconnect lead 29, 30 and 31
from TB11 inside control box (refer
to wiring diagram). If fault lamp
still lights with leads disconnected,
remove and replace engine monitor
plug-in printed circuit board.
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