C280-08 Marine Engine Alarms and Shutoffs Caterpillar


Alarms and Shutoffs
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C280-08 Marine Engine [SEBU9118]
ELECTRICAL AND STARTING SYSTEM
ALARM GP
C280-08 Marine Engine Alarms and Shutoffs
1.1. Setpoints for Alarms and Shutoffs
2.1. Aftertreatment Emission Fault Codes

Setpoints for Alarms and Shutoffs

Alarms and shutoffs are activated by critical operating temperatures, pressures, levels, or speeds.

Engines are equipped with alarms in order to alert the operator if undesirable operating conditions occur. When an alarm is activated, corrective measures must be made before damage to the engine can occur.

Shutoffs are set at more critical operating setpoints than alarms. Any problem that causes the engine to shut off must be corrected before the engine is restarted.

Table 1 lists the alarms and shutoffs that are available and the corresponding suggested setpoints. Some of the conditions that cause an alarm will also cause the engine to be derated.

When the "SHUTDOWN PRTN OVERRIDE" switch is in the ON position, no shutoff or derate will occur unless one of the following conditions occurs:

  • An overspeed condition exists

  • The "EMERGENCY STOP" switch is activated.

Note: Some of the items that are listed in Table 1 are optional.

Table 1
Alarms and Shutoffs for C280 Engines (Distillate Fuel)    
Condition     Parameter     Application     Setpoint for Alarm     Setpoint for Shutoff    
Cooling System    
High     SCAC water pump outlet temperature     Temperature regulator
38° C (100° F)    

45° C (113° F)    

61° C (142° F)    
Low     Aftercooler and oil cooler
water pump pressure (outlet)    
-    
70 kPa (10 psi) (1)    
-    
Low     Auxiliary water pump pressure (outlet)     -    
70 kPa (10 psi) (1)    
-    
Low     Coolant level     -     Level     -    
Low     Jacket water pump
pressure (outlet)    
-    
70 kPa (10 psi) (1)    
-    
High     Jacket water coolant temperature (outlet)     -    
103 °C (217 °F)    

109 °C (228 °F)    
Minimum differential     Jacket water coolant temperature (inlet) and engine oil temperature (inlet)     -    
2 °C (4 °F) (2)    
-    
Exhaust    
High     Exhaust port temperature deviation     -    
50 °C (90 °F) difference from the average temperature of all of the cylinders    
-    
High     Turbocharger exhaust inlet (before turbine)     -    
630 °C (1166 °F)    
-    
High     Turbocharger exhaust inlet (before turbine)     High Output rating    
650 °C (1202 °F)    
-    
High     Exhaust port temperature     -      (3)     -    
Fuel    
High     Fuel filter differential pressure     -    
75 kPa (11 psi)    
-    
Low     Fuel pump pressure (outlet)     The engine speed is less than 650 rpm.    
140 kPa (20 psi) (4)    
-    
Low     Fuel pump pressure (outlet)     The engine speed is greater than 650 rpm.    
260 kPa (38 psi) (4)    
   
High     Fuel temperature (inlet)     -    
66 °C (151 °F)    

72 °C (162 °F)    
Inlet Air    
High     Air filter differential pressure (restriction)     -    
3.7 kPa (.54 psi)    
-    
High     Inlet manifold air pressure (boost pressure)     -      (5)     -    
High     Inlet manifold air temperature    
50 °C (122 °F) aftercooler and oil cooler
water temperature regulator    

92 °C (198 °F)    

98 °C (208 °F)    
High     Inlet manifold air temperature    
50 °C (122 °F) aftercooler and oil cooler
water temperature regulator
(with a High Performance Aftercooler)    

78 °C (172 °F)    

98 °C (208 °F)    
High     Inlet manifold air temperature    
32 °C (90 °F) aftercooler and oil cooler
water temperature regulator    

75 °C (167 °F)    

98 °C (208 °F)    
High     Inlet manifold air temperature    
32 °C (90 °F) aftercooler and oil cooler
water temperature regulator
(with a High Performance Aftercooler)    

61 °C (142 °F)    

98 °C (208 °F)    
Lubrication    
High     Crankcase pressure     -    
0.6 kPa (.09 psi)    

1 kPa (.15 psi)    
High     Engine oil temperature     -    
92 °C (198 °F)    

98 °C (208 °F)    
Low     Engine oil level     -    
50 mm (2 inch) above the inlet for the oil suction    
-    
Low     Engine oil pressure     The engine speed is less than 650 rpm.    
120 kPa (17 psi) (6)    

105 kPa (15 psi)    
Low     Engine oil pressure     The engine speed is less than 650 rpm.    
320 kPa (46 psi) (6)    

260 kPa (38 psi)    
High     Engine oil filter differential pressure     -    
70 kPa (10 psi)    

165 kPa (24 psi)    
High     Detection of oil mist     -     Presence of oil mist in the crankcase    
N/A     Metal particle detection     -     Presence of metal particles in the oil lines    
Miscellaneous    
High     Overspeed     -     -     113 % of rated rpm    
Low     Air starting motor
supply pressure    
Vane    
750 kPa (109 psi)    
-    
Low     Turbine
515 kPa (75 psi)    
-    
( 1 ) An optional setpoint is 0.07 kPa times the engine rpm.
( 2 ) The minimum difference between the two temperatures must be greater than 2 °C (4 °F)The following is an example of a 5 °C acceptable difference. A jacket water coolant temperature inlet of 90 °C minus a lube oil temperature inlet of 85 °C.
( 3 ) An alarm for the temperature of the exhaust port is specific to the particular project. The primary alarm for exhaust temperature is the exhaust inlet to the turbocharger.
( 4 ) An optional setpoint is 0.4 kPa times the engine rpm.
( 5 ) The setpoint is determined by adding 30 kPa to the maximum test specification from the dynamometer.
( 6 ) An optional setpoint is 0.5 kPa times the engine rpm.

Aftertreatment Emission Fault Codes

A recorder that has been installed in the engine control panel will record critical emission codes. These codes are required by the EPA. The operator will have up to 30 days to notify the EPA of all fault code events. Consult your Cat dealer for additional information concerning fault codes.

You are required to report to the EPA within 30 days if any of the codes listed below are recorded. As the manufacture of major components in the engine system, AVSpare has installed an A5N2 recorder in the CMPD (Color Marine Power Display) panel. AVSpare has also installed an A5N2 in the CAPS (Cat Alarm and Protection System) panel. You will be allowed access to the recorder by using a standard ether net cable. The report will include why, when, and what caused the system to record one or more of the codes listed below.

Send the report to the following address:

Designated Compliance Office Manager
Heavy Duty and Non-road Engine Group 6403-J
U.S. Ave NW
Washington D.C. 20460

The codes listed below are codes that result in incorrect operation and/or a low DEF level in the DEF tank. If the complete engine system is maintained correctly and proper fluids used, the codes listed below will not be recorded.

  • 3516-17 Aftertreatment exhaust flow

  • 4360-16 Aftertreatment exhaust temperature medium severity

  • 3360-2 Aftertreatment dosing pump emergency switched turned off

Each engine control panel will have a recorder installed. If your vessel has more than one engine installed, you will need to ensure that all engine systems are functioning as designed. The Cat engine system will record many more faults/events codes that can be used to help troubleshoot the system if something is not working correctly. Your Cat dealer will be able to help you troubleshoot and understand engine and aftertreatment codes.

Table 2
Setpoints for Aftertreatment    
Condition     Parameter     Application     Alarm Setpoint (Default)     Derate Setpoint (Default)     Shutoff Setpoint (Default)    
High (1)     SCR Inlet Temperature        
500° C (932° F)    
       
High (2)     SCR Inlet Temperature        
525° C (977° F)    
       
High (3)     SCR Inlet Temperature        
575° C (1067° F)    
       
Low     SCR Inlet Temperature         Map - On            
High (1)     SCR Outlet Temperature         Map - On            
High (2)     SCR Outlet Temperature         Map - On            
High (3)     SCR Outlet Temperature         Map - On            
Low     SCR Outlet Temperature         Map - On            
High     DEF Pressure         Map - On            
Low     DEF Pressure         Map - On            
High     DEF Dosing Air Pressure        
450 kPa (65.3 psi)    
       
Low (1)     DEF Dosing Air Pressure        
400 kPa (58 psi)    
       
Low (2)     DEF Dosing Air Pressure        
275 kPa (40 psi)    
       
High     DEF Concentration         Map - On            
Low     DEF Concentration         Map - On            
High     DEF Manifold Temperature        
50° C (122° F)    
       
Low (1)     DEF Manifold Temperature        
−5° C (23° F)    
       
Low (2)     DEF Manifold Temperature        
−10° C (14° F)    
       
High     CEM Inlet Air Pressure         Map - On            
Low     CEM Inlet Air Pressure         Map - On            
Low (1)     DEF Buffer Tank Level         14 percent            
Low (2)     DEF Buffer Tank Level         7 percent            
Low (3)     DEF Buffer Tank Level         0 percent            
High     DEF Bulk Tank Level Switch         Closed            
Low     DEF Bulk Tank Level Switch         Closed            
High     NOx Conversion         Map - On            
Low     NOx Conversion         Map - On            
Low (1)     Tank Temperature        
−6° C (21.2° F)    
       
Low (2)     Tank Temperature        
−8° C (17.6° F)    
       
Low (3)     Tank Temperature        
−9° C (16° F)    
       
High     Tank Temperature        
50° C (122° F)    
       
( 1 ) Low
( 2 ) Medium
( 3 ) High

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