Psg Nepra 4000 Series Manual

Section 20.14
Troubleshooting Electronic Fire Commander

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The Information Center displays DDEC ECM/ECU diagnostic codes and limited engine information as well as PSG status.‪

The Information Center display can be used as an aid in troubleshooting the Pressure Governor System and the Electronic Fire Commander. See Figure 'Electronic Fire Commander Panel Display' .‪

Figure 1. Electronic Fire Commander Panel Display

Some of the common troubles encountered during the installation and check out of the Electronic Fire Commander and suggested actions are listed in Table 'Electronic Fire Commander Troubleshooting'.‪

Condition‪	Action‪
EFC Will Not Light Up‪	Check that the necessary switches are turned on.‪
EFC Will Not Light Up‪	Check that there is a 12 VDC between pins #1 and #2 at the EFC 4-pin connector, as listed in Table '4-pin Connector, Deutsch DT06-4S, DDC P/N: 23512304'.‪
Throttle Will Not Increase In RPM Mode‪	Check that the THROTTLE READY lamp is on. The EFC will not respond in RPM mode unless the OEM safety interlock requirements that enable the throttle are met.‪
	Press the PRESET and then the INC buttons. Does the EFC indicate it is increasing RPM on the data display?‪
	Check the switch and outputs I/O test. (Accessed in the Information Center menu.)‪
	Re-initialize the EFC. (Remove power to the EFC; wait ten seconds and then power the unit and try again. The EFC performs a 'self-test' when it is powered up. This is indicated on the EFC by a momentary lighting of all the display segments.)‪
Throttle Will Not Increase In Pressure Mode‪	Check that all three lamps: PUMP ENGAGED, OKAY TO PUMP, and THROTTLE READY are on.‪
	Press the INC and then the PRESET buttons to increase pump pressure.‪
	Check for a pump discharge pressure reading in the Menu.‪
	Re-initialize the EFC. (Remove power to the EFC; wait ten seconds and then power the unit and try again. The EFC performs a 'self-test' when it is powered up. This is indicated on the EFC by a momentary lighting of all the display segments.)‪
Engine Data Display Is Showing All Zeroes‪	Check that the connections at pins #3 and #4 of the EFC 4-pin connector, as listed in Table '4-pin Connector, Deutsch DT06-4S, DDC P/N: 23512304', are secure.‪
Engine Data Display Is Showing All Zeroes‪	Check that there is continuity on the 900 and 901 circuits from the ECM/ECU connector to the EFC connector.‪
THROTTLE READY Lamp Will Not Turn On‪	Check that the parking brake is on.‪
	Check that the transmission is in neutral, or the hand throttle (PTO) is engaged.‪
	Check for 12 VDC at pin #2 of the EFC 12-pin connector as listed in Table '12-pin Connector, Deutsch DT06-12S, DDC P/N: 23520825'.‪
	Check that all OEM safety requirements for pump operation are fulfilled.‪ Is the parking brake on?
	Is the transmission in the proper range for pump operation?
	Is the hand throttle (PTO) engaged?
	Is there an OK to PUMP indication in the cab?
	Check for 12 VDC at pin #10 of the EFC 12-pin connector as listed in Table '12-pin Connector, Deutsch DT06-12S, DDC P/N: 23520825'.‪
Mode Will Not Change From RPM to Pressure‪	Are the PUMP ENGAGED and OKAY TO PUMP lamps on?‪
Mode Will Not Change From RPM to Pressure‪	Does the MODE switch pass the I/O test? (Accessed in the Information Center menu.)‪
PRESET Button Doesn't Work‪	Check that the proper lamps are on for the mode you want to operate.‪
	Is there a valid preset programmed into the menu? If not, refer to '20.14.1 PROGRAMMING THE ELECTRONIC FIRE COMMANDER' and complete the steps given there.‪
	Does PRESET pass the I/O test? (Accessed in the Information Center menu.)‪

Table 1. Electronic Fire Commander Troubleshooting

EFC Connector Cavity‪	Circuit Description‪	ECM/ECU Circuit‪	EFC Input/Output‪
A1‪	DDEC Accessory Power‪	V-15‪	(+) System Power‪
A2‪	DDEC Accessory Ground‪	Batt (-)‪	(-) System Ground‪
A3‪	DDEC 1708 Data Link (+)‪	V-56‪	J1587 Serial Link‪
A4‪	DDEC 1708 Data Link (-)‪	V-57‪	J1587 Serial Link‪

Table 2. 4-pin Connector, Deutsch DT06-4S, DDC P/N: 23512304

EFC Connector Cavity‪	Circuit Description‪	ECM/ECU Circuit *‪	EFC Input/Output‪
B1‪	DDEC PSG Mode Select‪	V-26‪	Output (ground) to DDEC‪
B2‪	OEM Interlock from OEM‪	—‪	Input (+12 VDC)‪
B3‪	Cavity plug‪	—‪	No connection‪
B4‪	DDEC PSG Mode‪	V-05‪	Input (ground) from DDEC‪
B5‪	DDEC PSG Enable‪	V-09‪	Output (ground) to DDEC‪
B6‪	DDEC PSG Increase‪	V-08‪	Output (ground) to DDEC‪
B7‪	DDEC PSG Decrease‪	V-47‪	Output (ground) to DDEC‪
B8‪	PSG Active‪	V-06‪	Input (ground) from DDEC‪
B9‪	Alarm‪	—‪
B10‪	PTO Engaged‪	—‪	Input (+12 VDC) from OEM‪
B11‪	Cavity Plug‪	—‪	No connection‪
B12‪	Low fuel‪	—‪

Table 3. 12-pin Connector, Deutsch DT06-12S, DDC P/N: 23520825

* DDC circuit numbers and port assignments shown are typical but can differ from application to application.

Section 20.14.1
PROGRAMMING THE ELECTRONIC FIRE COMMANDER

Program the EFC by selecting items from a menu. When the EFC is in Programming Mode only the Information Center lights will be visible.‪

To enter the programming menu:‪

Ensure the PTO/Pump is disengaged (i.e. 0 volts on pin B10 'PTO/Pump Engaged') and that engine speed is less than 900 RPM.
Press and hold the MODE and MENU buttons at the same time until 'PRESS IDLE TO EXIT' is momentarily displayed on the Information Center, then release both buttons.
Scroll through the menu by pressing the MENU button.
Change a menu selection using the INC and DEC buttons.
Exit the programming menu in one of two ways:
1. Press IDLE to exit the menu and save changes.
2. Press MODE to exit the menu without saving changes.

Section 20.14.2
EFC Programming Menu Options

As you scroll through the menu by repeatedly pressing the MENU button, the following items, listed in Table 'EFC Programming Options on Information Center Menu', will appear sequentially in the Information Center display.‪

Menu Item‪	Explanation‪	Programming‪
Menu Item‪	Explanation‪	Button‪	Change‪
RPM Preset Point:‪	Preset Engine Speed‪	Incr/Decr‪	+/- 25 RPM‪
Pressure PRESet (PSI):‪	Preset PSI‪	Incr/Decr‪	+/- 25 PSI‪
Engine Hour meter:‪	Information Only‪	--‪	--‪
Pump Hour meter:‪	Information Only‪	--‪	--‪
Engine Temperature:‪	Oil or Coolant‪	Incr/Decr‪	Cycles options‪
Pump Pressure (PSI):‪	Pressure Reading if Active‪	--‪	--‪
DDEC Software Ver:‪	ECM/ECU Revision Level‪	--‪	--‪
EFC Software Ver:‪	EFC Revision Level‪	--‪	--‪
Fire Commander I/O Test:‪	Test Switches and Outputs‪	Any‪	--‪
Press [MODE] Test Lights:*‪	Tests Display Panel & Audible Alarm‪	Mode‪	--‪
Set Time Clock:‪	Set Clock‪	Incr/Decr‪	+/- 1 minute‪
Units of Measure:‪	English or Metric‪	Incr/Decr‪	Cycles options‪
Welcome Message:‪	Enable or Disable‪	Incr/Decr‪	Cycles options‪
Codes Currently Active:‪	Information Only‪	--‪	--‪
Connector Data:‪	Displays Connection Pinouts‪	Incr/Decr‪	Scroll fwd/back‪
SAVE? [Idle Y] [Mode N]‪	Exit and Save Options‪	--‪	--‪

Table 4. EFC Programming Options on Information Center Menu

* PUMP ENGAGED and THROTTLE READY will not illuminate.