Holding the switch in the increase position (grounding the digital input), will increase the set point pressure at a rate of two increments per second. Momentarily toggling and releasing the Increase Switch (grounding the "Resume/Acceleration On" digital input) increases set point pressure by 4% of the pressure range. The initial pressure set point is saved between ignition cycles. The minimum and maximum pressure setting for each of the horsepower curves is set with the DDDL/DDR, Vehicle Electronic Programming System (VEPS), or DRS. Horsepower ratings are defined at time of order entry. Table 5-1 Engine Operation with Air Compressor ControlsĮach horsepower rating has an associated pressure range. ![]() Once the air pressure has dropped to a lower programmable limit, the digital output will be open circuited which will either close the vent This output may be used to either open an air compressor vent or close the air inlet. When the pressure reaches a programmable limit above the pressure set point the DDEC digital output will be grounded. † DDEC will open and close the loading valve as a function of pressure with hysteresis. * The engine will continue to run at PTO maximumuntil the outlet pressure matches the sensor pressure. The air compressor solenoid digital output isĬurrent outlet pressure is above the pressure setĮngine speed decreases as required down to the Pressure in the system continues to increase and The engine response to various pressure conditions is listed in Table 5-1.Ĭurrent outlet pressure is below the pressure setĮngine speed increases as required up to PTO The Air Compressor Pressure Sensor provides a pressure signal to the ECM. Engine speed is governed based on the actual air compressor outlet pressure versus the desired output pressure. The ECM will activate the Air Compressor Governor Controls when the digital input “Air Compressor Load Switch” is grounded. The desired operating pressure may be varied by the operator, within limits preset by the OEM. The ECM monitors the air outlet pressure while varying the engine speed and operating load/unload a valve. The DDEC Air Compressor Control Feature is available with the following software releases:ĭDEC IV - all software versions (Release 20.0 or later) Īir Compressor Controlis an optional DDEC feature that allows DDEC to regulate engine speed and load/unload a valve in order to maintain a requested compressor outlet air pressure for air compressor applications. Īll information subject to change without notice. IDLE SHUTDOWN TIMER AND VEHICLE POWER SHUTDOWN. ĥ.4 CRUISE CONTROL FOR DRILLING/PUMPING APPLICATIONS WITH The mode won’t change from RPM to Pressure.DDEC IV APPLICATION AND INSTALLATION MANUALĪIR COMPRESSOR CONTROL. Is the Parking Brake on? Is the transmission in the proper range for pump operation? Is the PTO engaged? Is there an OK to PUMP Signal in the cab? Check for 12 VDC at pin #10 of the EFC 12 pin connector. Check: All OEM safety requirements for pump operation must be fulfilled. Troubleshooting the Detroit Diesel Electronic Fire Commander: The PUMP ENGAGED and OKAY to PUMP LED’s won’t turn on. The INC, DEC, IDLE,MODE and PRESET switches as well as their outputs are tested. You can use the EFC I/O test as an aid in troubleshooting. Additionally the VSS should be turned off in pressure governor operation. Troubleshooting the Detroit Diesel Electronic Fire Commander: The DDEC III ECM must be programmed for Pressure Sensor Governing and the Digital I/O’s must be configured properly for PSG operation. Exiting the programming menu is done in one of two ways. Change to a selection is performed by using the INC and DEC switches. Moving through the menu is accomplished by pressing the MENU switch. To enter the programming menu, Press and hold the MODE and MENU switches at the same time until “Press Idle to Exit “ is displayed on the information center, then release both switches. Programming the Detroit Diesel Electronic Fire Commander: Programming the EFC is simply a matter of selecting items from a menu. l a Engine speed can be controlled to a predetermined RPM by pressing the PRESET switch. The RPM LED will be on to indicate that the EFC will operate in the RPM mode. Operating the Detroit Diesel Electronic Fire Commander: RPM Mode: The EFC must be on and the Throttle Ready LED (interlocks necessary for increased throttle operations are active) must be illuminated before any RPM adjustments can be made. ![]() The operating mode of the Fire Commander can be changed from RPM Mode to Pressure Mode and back without the need to return to idle. The RPM Mode controls the engine speed to a desired RPM and the Pressure Mode controls the engine speed to maintain a desired pump discharge pressure. Operating the Detroit Diesel Electronic Fire Commander (EFC): MODES: There are two modes of operation for the Electronic Fire Commander.
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