O & M Manual IM05805019K EATON Diesel Plus
Effective June 2011 Diesel Engine Fire Pump Controller
6 EATON CORPORATION www.eaton.com
The Diesel Plus Controller front panel serves two primary 
functions: output and input. The output function consists of:
• A four-line, 40 character LCD display module
• Twenty Four LED outputs: 
Engine Run Interlock On
Remote Start Speed Switch Fault
Deluge Valve ECM Selector in Alt. Position
Low Pressure Fuel Injection Malfunction
Fail to Start Low Fuel
Charger #1 Failure Low Suction Pressure
Charger #2 Failure Low Oil Pressure
Battery #1 Failure Engine Overspeed
Battery #2 Failure High Engine Temperature
Six (6) user defined LEDs.
There are nine input functions accessible via the pushbuttons:
• Silence Alarm
• Engine Test
• Data | Print
•Lamp Test
• Reset | Save/Exit
•Up
•Down
•Ack. Alarm
•Menu
A four-line, 40-character alphanumeric LCD Display module is 
used to display all Diesel Plus monitored parameters, set 
points, and messages in easy to read formats. The display has a 
green high contrast background that allows clear visibility of 
any information displayed. The display is continuously lit for 
clear visibility under poorly lit or no light conditions.
Seven different displays can be presented via the LCD display:
• Status Display
• Set Points Display
• Statistics Display
• Diagnostics Display
•History Display
• Data/Print Display
• Message History Display
The “Home” screen display will show the current date and 
time, current pressure, Battery #1 voltage and charging amps, 
Battery #2 voltage and charging amps and whether Automatic 
Shutdown is in ON or OFF mode.
The fourth line of the display indicates the time remaining on 
any active timers, alarms without an associated LED, and 
custom messages.
3.2.1 The LEDs
• Engine Run - This green LED will be illuminated when there is 
an Engine Run signal from the engine.
• Remote Start - This green LED will be illuminated after 
receiving a start signal on the remote start input. 
(Terminals 11 and 34)
• Deluge Valve - This green LED will be illuminated after 
receiving a start signal from special starting equipment. This 
is a normally closed contact that is required to be opened to 
start. A factory installed jumper wire must be removed to use 
these contacts. (Terminals 11 and 35)
• Low Pressure - This green LED will flash when the system 
pressure has dropped below the programmed low pressure 
alarm set point. This LED will be fully illuminated when the 
pressure falls below the pressure start point.
• Fail to Start - This red LED will be illuminated if the controller 
has not received an engine run signal from the engine after 
attempting to crank the engine a total of 6 times
• Battery # 1 Failure - This red LED will be illuminated during 
the cranking cycle when the controller detects a weak or 
discharged battery, i.e. 67% of rated voltage, or less, or 
whenever a battery cable is disconnected.
• Battery # 2 Failure - This red LED will be illuminated during 
the cranking cycle when the controller detects a weak or 
discharged battery, i.e. 67% of rated voltage, or less, or 
whenever a battery cable is disconnected.
• Charger # 1 Failure - This red LED will be illuminated when 
the supply power to the charger is lost or when the charger 
malfunctions. The engine continues to run. To avoid nuisance 
alarms, the AC Power Failure Alarm set point can be 
increased.
• Charger # 2 Failure - This red LED will be illuminated when 
the supply power to the charger is lost or when the charger 
malfunctions. The engine continues to run. To avoid nuisance 
alarms, the AC Power Failure Alarm set point can be 
increased.
• Interlock On - This green LED will flash when the interlock 
input is received, signaling that another controller or device 
has locked out the controller. (Terminals 11 and 39)
• Speed Switch Fault - This red LED will be illuminated if the 
controller is running, the engine run signal is lost and the oil 
pressure does not drop. (Terminals 2 and 4)
• ECM Selector in Alt. Position - This red LED will be illuminated 
when the controller receives a signal from the engine 
indicating the engine is running on the alternate ECM. 
(Terminal 301)
• Fuel Injection Malfunction - This red LED will be illuminated 
when the controller receives a signal from the engine 
indicating there is a fuel injection malfunction. (Terminal 302)