CONTROLS, INCORPORATED
C O N T R O L S Y S T E M S & S O L U T I O N S
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PANEL ENGINE SAFETY PROTECTIONS
PREALARMS AND ALARM
The primary engine protection in an engine equipped with an ECU is managed by the engine’s ECU.
The display will show lamp status and trouble code information based on the ECUs messaging to the
display. The control panel does not create a trouble code; however, it will display it. In addition, the
control panel will monitor the critical engine parameters of speed, coolant temperature and oil
pressure. Pre Alarms are considered to be warnings that a parameter is nearing a point where
engine damage may occur if not corrected. Alarms are considered to be the limit of the engine
operating without causing damage. Therefore, alarm conditions may shut the engine down, or
invoke other behavior as selected, while the pre alarms will allow the engine to continue to run. The
control will log the condition and attempt to bring attention to it by illuminating a yellow LED lamp
and flashing the affected parameter. The alarm condition will also be accompanied by a red LED
lamp and a specific message of what parameter caused the engine to shut down.
SAFETY SHUTDOWNS
Once the engine is started, the engine’s ECU has primary control over the operation of the engine
under safe conditions. If the ECU detects that any of its critical parameters are out of tolerance, the
ECU can take a variety of actions including derating of the engine horsepower or complete engine
shut down. The display will illuminate the red or yellow LED as instructed by the ECU and display
any trouble code as presented from the ECU. Some engine manufacturers have unique codes that
the control panel will show in lieu of the J1939 DM1 messaging. Otherwise codes will be displayed
as J1939 SPN (Suspect Parameter Number) and FMI (Failure Mode Identifier).
