DSE Model 521 Remote Start Engine Management System - Operators Manual
DSE 521 ISSUE 4 4/4/02 MR 7
2. PROTECTIONS
The LED’s will indicate the fault condition and one of the auxiliary outputs if selected to be a
common alarm output, will activate. First up fault is indicated by a flashing
LED, subsequent faults
which happen simultaneously are indicated by a steady
LED. Warnings are also indicated by a
steady
LED. Indications are fed directly from the appropriate input and are indicated by a steady
LED which will be present for as long as the input is active, this feature can be used to allow the
module to operate as an Annunciator.
NOTE 1:-An auxiliary output may be configured as one of three alarm options,
Shutdown, Warning or Common Alarm (Shutdown and Warnings). This is in addition to the
list of other control sources from which it may be driven.
NOTE 2:-There is a Common alarm LED on the front panel which illuminates to indicate
all Shutdown and Warning faults, this is mainly used to indicate fault conditions such as
Emergency Stop, Fail to Stop, Underspeed, Sensor Fail and Oil Pressure Switch which do
not have their own individual LED to indicate the fault. A warning indication is illuminated
steady, while shutdown indications flash.
NOTE 3:- A corrupt configuration is indicated by all the LED’s flashing. The module
must then be re-configured.
2.1 WARNINGS
Warnings are self resetting, once the fault has been removed the input is reset.
CHARGE FAIL, If charge alternator voltage falls below the pre-set trip voltage after the end of
safety on timer. The
Charge Fail LED is illuminated.
AUXILIARY INPUTS, if an auxiliary input has been configured as a warning the appropriate LED
will illuminate.
OIL PRESSURE SWITCH, the 521 will only attempt to crank the engine if the Oil Pressure is
initially low, (engine at rest, not running). It is also possible that this could indicate that the Oil
Pressure switch is faulty if engine not running. The
Common Alarm LED will illuminate.
2.2 SHUTDOWNS
Shutdowns are latching and stop the Generator. The selector switch must be turned to Stop Reset
and the fault removed to reset the module.
EMERGENCY STOP, removal of the +ve DC Supply from the Emergency Stop input initiates the
following sequence, firstly it will initiate a controlled shutdown of the Generator and prevent any
attempt to restart the Generator until the Emergency Stop push-button has been reset. Secondly it
removes the
+ve DC supply from both the Fuel Solenoid and Starter Solenoid. This input is always
active when
AUTO or MANUAL is selected.
NOTE:- The Emergency Stop signal must be present otherwise the unit will shutdown.
LOW OIL PRESSURE, activation of the Low Oil Pressure input after the Safety On timer has
expired, initiates a shutdown. The
Low Oil Pressure LED will flash.
HIGH ENGINE TEMPERATURE, activation of the High Engine Temperature input after the Safety
On
timer has expired, initiates a shutdown. The High Engine Temperature LED will flash.
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