DSE Model 5520 Automatic Mains Failure Control and Instrumentation System Operators Manual
5520 OPERATING MANUAL ISSUE 1 04/02/05 AM
19
3.3 SHUTDOWNS
Shutdowns are latching and stop the Generator. The alarm must be cleared and the fault removed
to reset the module.
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
i
s
t
he
Low
Oi
l
Pressure
al
arm
and
si
mi
l
ar
‘
del
ayed
al
arms’
,
as
t
he
oi
l
pressure
wi
l
l
be
low with the engine at rest).
FAIL TO START
, if the engine does not fire after the pre-set number of attempts has been made
a shutdown will be initiated. Alarm Shutdown Fail To Start will be displayed.
Alarm
Shutdown
Failed to start
EMERGENCY STOP
, removal of the
+ve DC
Supply from the Emergency Stop input initiates the
following sequence, firstly it will initiate a shutdown of the Generator and prevent any attempt to
restart the Generator until the Emergency Stop push-button has been reset. Additionally it
removes the
+ve DC
supply from both the Fuel Solenoid and Starter Solenoid.
Alarm Shutdown Emergency Stop will be displayed.
Alarm
Shutdown
Emergency stop
NOTE:- The Emergency Stop +Ve 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. Alarm
Shutdown Low Oil Pressure will be displayed.
Alarm
Shutdown
Low oil pressure
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. Alarm Shutdown High Engine Temperature will be displayed.
Alarm
Shutdown
High temperature