SENSOR AS-PRESS 7X1602 - Caterpillar

OP9 is the option for verifying that the EMCP II+ operates correctly when a fault occurs with low oil pressure, high coolant temperature or engine overspeed. An engine overspeed fault causes the GSC+ to shut off the engine. When a low oil pressure fault or a high water temperature fault is detected the GSC+ will shut off the engine or the GSC+ will sound the alarm according to the programmed setpoint P003. Setpoint P003 is the shutdown override setpoint for an engine fault.OP9 is only for verification of certain engine setpoints. OP5-0 is used for the actual programming of these setpoints. The setpoints that are verified by this procedure are listed below.P003 Shutdown Override For Engine Fault - P003 is the GSC+ response to a low engine oil pressure. P003 is also the response to a high coolant temperature fault. 0 is for engine shutdown. If P003 is set to 1 then the alarm responds only. The GSC+ will override engine shutdown. The default value for P003 is 0.P010 Engine Overspeed - The GSC+ uses setpoint P010 in order to show an engine overspeed fault. The engine overspeed setpoint is 1.18 times the rated speed for all 60 Hz applications. The values vary from 500 to 4330 rpm. The values are changed in increments of 10. The default value for P010 is 2120.P013 Low Oil Pressure Shutdown At Rated Speed - The oil pressure is used by the GSC+ to declare that a low oil pressure shutdown fault exists with the engine at rated speed. The speed must have exceeded the oil step speed setting for at least nine seconds. The values vary from 34 to 420 kPa (5 to 61 psi). The increments increase with a value of 1. The default value for P013 is 205 kPa (30 psi).Note: When the oil pressure drops to a level that is within 34 kPa (5 psi) of the P013 setpoint, a low oil pressure alarm is issued by the GSC+ and the optional alarm module.P015 High Water Temperature Shutdown - The coolant temperature is used by the GSC+ to declare that a high coolant temperature shutdown fault exists after a 10 second delay. The values vary from 85 to 123°C (185 to 253°F). The increments increase with a value of 1. The default value for setpoint P015 is 107°C (225°F).Note: A high water coolant temperature alarm is issued by the GSC+ when the coolant temperature rises to a level that is within 6°C (11°F) of the P015 setpoint. The following conditions are required before the engine setpoints are verified.
The previously listed setpoints must be correct for the engine application. See System Operation, "Service Mode" in order to view a list of the setpoints. See System Operation, "Setpoint Programming OP5" in order to program the setpoints.
The engine is checked at rated speed. No faults should be present at the initial starting. If necessary, troubleshoot and correct any fault.Procedure For Overspeed Verification
Note: Service mode cannot be accessed when the engine control