105404-5121 ZEXEL 9 420 614 504 BOSCH GOVERNOR 9420614504 1054045121

Shutdowns
A shutdown secures the fuel and a shutdown secures the air to the engine. A fuel shutoff solenoid may be located in the fuel actuator. The fuel shutoff solenoid is energized. The injector is driven to the off position. This secures the fuel.The air shutoff solenoid secures the air. When this solenoid is activated compressed air flows to the air damper. The air releases a pin. When the pin is released, a spring closes the air damper. This secures the combustion air supply from the turbochargers to the aftercooler.Note: The air damper must be MANUALLY reset before the engine can be restarted. The Marine Engine Control Panel must also be reset with the "RESET" switch before the MMS will allow starting. The panel may not be reset until the engine has stopped rotating. Determine the cause of the shutdown and correct the problem prior to engine operation.
Table 2
Shutdowns of the Marine Monitoring System    
Description    Sensor Location
Group Part Number (1)    Set Point    Source of the Alarm    
Pressure    
Low Oil Pressure     142-5916 or 146-9438 Block 1    
105 kPa (15 psi) @LS
260 kPa (38) @HS     Low Speed Oil Contactor or High Speed Oil Contactor, or the Lube Oil Filter Outlet Pressure Transducer    
High Crankcase Pressure     147-2369 In-line 142-5919 Vee    
1 kPa (.15 psi)     Crankcase pressure contactor    
Temperature    
High Jacket Water Outlet Temperature     142-5916 or 146-9438 Block 4    
109 °C (228 °F)     Jacket Water Contactor or Optional Transducer    
Miscellaneous    
Oil Mist Detector     Various     Contact Closure     Oil Mist Detector - Not in all engines    
Overspeed     146-5522, 146-5523, 146-5524, 146-5525     113% of Rated Speed     Engine Speed Switch and MMS    
Metal Particle Detection     Basic Engine     Metal Particles in Oil Plus 5 Seconds     Metal Particle Detector    
( 1 ) The group part numbers are provided for reference only. For individual part numbers see Reference Information, "Reference Parts Information".Low Speed - The engine speed is below 75% of the rated engine speed.High Speed - The engine speed is above 75% of the rated engine speed.The "Sensor Failure Alarm" Screen
The "Sensor Failure Alarm" screen is displayed when unexpected signals are received by the PLC. The alarm monitors sensors which can produce alarms or shutdowns.
Table 3
Sensor Failure Alarms for the Marine Monitoring System    
Description    Sensor Location
Group Part Number (1)    Set Point    Source of the Alarm    
RTD/PT 100 Failures     Various    
< -50 °C (-58 °F) or
> 150 °C (302 °F)     Lube oil, After Cooler/Oil Cooler, Jacket Water, and Inlet Manifold Temperatures    
Thermocouples     Various    
< -50 °C (-58 °F) or
> 700 °C (1292 °F)     Individual Cylinder, Pre-Turbine, and Stack Thermocouples    
4-20mA Transducers     Various     < 3.5 mA or > 20.15 mA     Engine Speed Transducer, Lube Oil and Fuel pressure transducers    
Contactors     Various     No signal