Unit Description
23
Engine Oil Pressure Switch/Sensor: The engine oil
pressure switch/sensor is located on the filter head above the
bypass oil filter. Engine oil pressure should rise immediately
on starting. If engine oil pressure drops below 10 ± 2 psig (69 ±
14 kPa), the switch/sensor signals the microprocessor to stop
the engine.
Preheat Buzzer: The preheat buzzer sounds when the
CYCLE-SENTRYTM system energizes the glow plugs. This
should warn anyone near the unit that the
CYCLE-SENTRYTM system is about to start the diesel
engine.
Coolant Temperature Sensor: This sensor provides an
engine coolant temperature input to the microprocessor. If the
engine coolant temperature is too high, the controller stops the
unit and records an alarm.
Electric Motor Overload Relay (Model 50): The
overload relay protects the electric standby motor. The
overload relay opens the circuit from the contactor to the
electric motor if the motor overloads for any reason and an
alarm will occur. The relay resets when the alarm code is
cleared.
Fuses: Sizes and functions are described in the Specifications
section of this manual.
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