DSE 720 - Shutdowns

- 10 - 057-001 720 Operating Instructions Issue 3.1 20/12/2005 AM
3.6 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 the appropriate icon will be illuminated
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 3 attempts at starting, a shutdown will
be initiated.
The
icon will illuminate.
LOW OIL PRESSURE, if the module detects that the engine oil pressure has fallen below the low
oil pressure setting 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 setting after the Safety On timer has expired, a shutdown
will occur.
The icon will illuminate.
OVERSPEED / OVERFREQUENCY, if the engine speed exceeds the pre-set trip a shutdown is
initiated. Overspeed is not delayed, it is an immediate shutdown.
The icon will illuminate.
NOTE:- During the start-up sequence the overspeed trip level is extended to 24%
above the normal frequency for the duration of the safety timer to allow an extra trip level
margin. This is used to prevent nuisance tripping on start-up.
UNDERSPEED / UNDERFREQUENCY, 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.
INPUTS 1 AND 2 can be configured as warnings or shutdowns. The relevant icon will be
illuminated when the input is active.
The item is indication only (not an alarm). For instance this could indicate “System in Auto”
(Flashing) The item has generated a Shutdown alarm condition.
FAILED TO REACH LOADING VOLTAGE, If the engine fires but the generator fails to reach the
loading voltage before the end of the Safety On timer a shutdown is initiated.
The icon will illuminate.
FAILED TO REACH LOADING FREQUENCY, If the engine fires but the generator fails to reach
the loading frequency before the end of the Safety On timer a shutdown is initiated.
The icon will illuminate.