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.
| 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 ManagerHeavy 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.
| 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 |