Onan EM Series - ENGINE SENSORS; OIL PRESSURE AND TEMPERATURE SENSORS

TABLE 2. FAULT LAMP OPTIONS
FAULT STOP EXTERNAL PRE-
SYSTEM
FAULT
LAMP
ENGINE
ALARM ALARM
PENN STATE
Overcrank
X
X X
SINGLE LIGHT '
Overspeed
X
X
X
Low Oil Pressure
X X
High Engine Temperature
X X
STANDARD
Overcrank
X
X
X
SINGLE LIGHT
Overspeed
X
X X
Low Oil Pressure
X X X
High Engine Temperature X X X
5 LIGHT
Overcrank
X X
X
Overspeed X X X
Low Oil Pressure X X
X
High Engine Temperature
X X
X
Low Engine Temperature
X
5 LIGHT
Overcrank
X X
X
PRE-ALARM
Overspeed
X
X X
Low Oil Pressure X *
X X
High Engine Temperature X
*
X
X
Low Engine Temperature X
* - With additional optional sensors.
ENGINE SENSORS
Resistance units and switches in the engine
temperature and oil pressure monitoring and shut-
down systems are sealed units and are not repairable.
For location, referto Figures 5 and 6. When replacing
a sensor, do not substitute, use recommended items.
Resistance units are matched to the gauge they
supply, and cut-off switches are close-tolerance
actuation parts, made for a specific application.
HIGH
ENGINE TEMPERATURE
CUT-OFF SWITCH
(HETCO)
LOW OIL
PRESSURE
SWITCH
(LOPKO)
B374
OIL PRESSURE
GAUGE SENDER
FIGURE 5. OIL PRESSURE MONITORS
FIGURE 6. ENGINE TEMPERATURE MONITORS
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