GEAR-ACCESSORY DRIVE 2W7320 - Caterpillar

OP9 is the option for verifying that EMCP II operates correctly when a fault occurs with low oil pressure, high coolant temperature or engine overspeed. During an engine overspeed fault indicator, the GSC will shut down the engine. The GSC will shut down the engine or the GSC will sound the alarm during a low oil pressure fault. The programmed setpoint P03 determines the GSC response. The GSC will shut down the engine or the GSC will sound the alarm during a high water temperature fault. Setpoint P03 determines the GSC response. OP9 is only for verification of certain engine setpoints. OP5 is used for the actual programming of these setpoints. The setpoints that are verified by this procedure are listed below.P03 Shutdown Override For Engine Fault - This is the GSC response to a low engine oil pressure fault or this is the GSC response to a high coolant temperature fault. The default setting from the factory is 0.0 - engine shutdown1 - alarm only P10 Engine Overspeed - P10 is the speed. This activates the engine overspeed fault indicator. The engine overspeed setpoint for all 60 Hz applications is 1.18 times the rated speed. The range of values is from 50 to 4330 rpm. The value is set in increments of 10. The default setting from the factory is 2120 rpm.P13 Low Oil Pressure Shutdown At Rated Speed - P13 is the pressure used by the GSC to indicate that a low oil pressure shutdown exists. This setpoint is active with the engine at rated speed. Also, the engine speed must have exceeded the oil step speed for nine seconds. The range of values is from 34 to 420 kPa (5 to 61 psi). The value can be raised in increments of 1. The default setting from the factory is 205 kPa (30 psi). Note: When oil pressure drops to 34 kPa (5 psi) of the P13 setpoint a low oil pressure alarm is issued by the GSC. If the generator is equipped, the optional alarm module also issues an alarm. The NFPA 99 remote annunciator will not issue an alarm. P15 High Water Temperature Shutdown - P15 is the coolant temperature that is used by the GSC to indicate that a high coolant temperature exists. The fault is indicated after a ten second delay. The range of values is from 94° to 123°C (201° to 253°F). The value can be changed in increments of 1. The default setting from the factory is 107°C (225°F).Note: When the coolant temperature rises to within 6°C (11°F) of the P15 setpoint, a high water temperature alarm is indicated by the GSC. If the generator is so equipped the optional alarm module issues an alarm as well. The NFPA 99 remote annunciator will not issue an alarm.The engine setpoints cannot be verified until the following conditions are met.
The setpoints must be correct for the engine application. See Systems Operation, "Service Mode" to view the setpoints.