STG global TANVAC HDV3000, Operator'S Manual

Page: 271 / 329

EP250 Panel Operation and Troubleshooting
463-3000-01 Rev D. 23-Sep-2013 5
Operation
Turning the panel key to the run position starts a self-test which causes all LEDs to illuminate once,
activates the alarm output for one second and enables the fuel run/stop solenoid output. After
self-test, the LEDs indicate the state of the inputs they monitor. The normal indications are battery
charge and oil pressure on most applications. If these LEDs are not illuminated at this time it may
indicate the inputs are not properly connected.
The Preheat LED is illuminated when the key switch is turned to the run position if automatic
preheat is configured or if an external preheat control is connected (See Preheat Options).
Preheat time varies from application to application. After waiting for the Preheat LED to
extinguish, the engine is cranked by turning and holding the key switch in the start position until
the engine starts. The key switch is spring loaded to return automatically to the run position when
released. The Preheat LED is illuminated during afterglow if enabled.
Note
The key switch is equipped with a mechanical start locking device.
An attempt to crank the engine again can only be made by turning the key switch
to the off position to reset the start locking mechanism.
If the engine is not started within 10 seconds of turning on the panel, the fuel run/stop solenoid
output is turned off to prevent battery discharge when the key switch is left in the run position.
The fuel run/stop solenoid output is turned off after 10 seconds even if preheating. As soon as the
key switch is turned to the start position the solenoid output is enabled. The afterglow cycle
begins when the key switch returns to the run position.
Note
If conditions do not warrant preheat, the engine may be started by turning the key
to the start position without waiting for the preheat time to expire.
Panel instrument power, including the hour meter and voltmeter, is provided by the fuel run/stop
solenoid output. If the instruments do not power up when the key is turned to the run position, this
indicates a problem with the solenoid circuit (see Troubleshooting).
After the engine starts, the panel electronics ignore all shutdown conditions for the first 10
seconds. This delay eliminates the requirement to hold a by-pass override button during starting
and allows the conditions such as oil pressure to normalize. The 10 second timer starts when the
key switch returns to the run position.
Note
Starter input is required for correct panel operation. If the starter motor input is not
activated (connected to battery positive) and the engine is started through
another means (i.e. air starter) the engine will shutdown 10 seconds after the key
switch is turned to the run position.
To prevent unintentional engine shutdowns caused by intermittent conditions (i.e., pressure
spikes, coolant movement) the panel requires a constant 1 second fault input to cause engine
shutdown.
Warning!
When used in combination with mechanical float type switches
engine vibrations may prevent constant contact closure.
The panel can be configured to shutdown with no delay.