Onan DYC Series Operator's Manual And Parts Catalog page 27

TABLE 4.
TROUBLESHOOTING ENGINE SHUTDOWN SYSTEM
(Units with five fault lamps)
SYMPTOM C O R R E C T I V E ACTION
1. Overcrank fault lamp lights and
engine stops cranking after
approximately 75-seconds.
1. See engine service manual for
troubleshooting fuel system.
After correcting fault, reset engine
monitor relay by placing Run-Stop/
Reset-Remote switch to Stop/Reset
position, depressing Reset button,
then to the required running position.
2. Engine runs, shuts down, cranks
for 75-seconds, cranking cycle stops,
overcrank light ON.
2. Check fuel supply.
3. "Low oil pressure shutdown. 3. Check—
a. Oil level. Replenish if necessary.
b. Sensor. Faulty sensor will shut
down engine.
c. Refer to engine service manual for
troubleshooting guide for oil
system.
4. "High engine temperature shutdown.
4. Check—
a. Coolant level. Replenish if
necessary.
b. City water cooled sets. Check
water flow, valves, etc.
c. Check sensor; check thermostat.
d. Radiator model, check fan belts,
radiator for obstructions, etc.
5. Overspeed shutdown. 5. Check governor and throttle linkages
for freedom of movement.
Check overspeed switch.
6. Overspeed light on, no shutdown. 6. Disconnect wire at TB11-29. Ught on
after reset; replace engine monitor
board.
7. "Low oil pressure light ON.
No shutdown.
7. Disconnect wire at TB11-30. Light
ON after relay reset. Replace engine
monitor board.
8. *High engine temperature light ON.
No shutdown.
8. Disconnect wire at TB11-31. Light
ON after relay reset. Replace engine
monitor board.
*NOTE: Not applicable on Pennsylvania State models.
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