DSE Model 5220 Automatic Mains Failure & Instrumentation System Operators Manual
5220 OPERATING MANUAL ISSUE 5.1 18-Jun-07 AM
13
4.4 SHUTDOWNS
Shutdowns are latching and stop the Generator. The alarm must be cleared, and the fault removed to reset the
module.
In the event of a shutdown alarm the LCD will display:-
(flashing).
The appropriate icon will also be displayed flashing
NOTE:- The alarm condition must be rectified before a reset will take place. If the alarm condition
remains it will not be possible to reset the unit (The exception to this is the Low Oil Pressure alarm and
similar ‘delayed alarms’, as the oil pressure will be low with the engine at rest). Any subsequent
warnings or shutdowns that occur will be displayed steady, therefore only the first-up shutdown will
appear flashing.
FAIL TO START
, if the engine does not fire after the pre-set number of attempts has been made a shutdown will
be initiated.
The
icon will illuminate.
EMERGENCY STOP
, removal of the
positive 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
positive DC
supply from
both the Fuel Solenoid and Starter Solenoid.
The
icon will illuminate.
NOTE:- The Emergency Stop positive signal must be present otherwise the unit will shutdown.
LOW OIL PRESSURE
, if the module detects that the engine oil pressure has fallen below the low oil pressure trip
setting level after the
Safety On
timer has expired, a shutdown will occur.
The
icon will illuminate.
HIGH ENGINE TEMPERATURE
if the module detects that the engine coolant temperature has exceeded the high
engine temperature trip setting level after the
Safety On
timer has expired, a shutdown will occur.
The
icon will illuminate.
OVERSPEED
, if the engine speed exceeds the pre-set trip a shutdown is initiated.
The
icon will illuminate.
Overspeed is not delayed, it is an
immediate shutdown
.
NOTE:-During the start-up sequence the overspeed trip logic can be configured to allow an extra
trip level margin. This is used to prevent nuisance tripping on start-up - Refer to the 5200 series
configuration software manual under heading ‘Overspeed Overshoot’ for details.
UNDERSPEED
, if the engine speed falls below the pre-set trip after the Safety On timer has expired, a shutdown is
initiated.
The
icon will illuminate.
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