DSE Model 5220 Automatic Mains Failure & Instrumentation System Operators Manual
5220 OPERATING MANUAL ISSUE 5.1 18-Jun-07 AM 11
4.1 WARNINGS
Warnings are non-critical alarm conditions and do not affect the operation of the generator system, they serve to
draw the operators attention to an undesirable condition.
In the event of a warning alarm the LCD will display:-
BATTERY CHARGE FAILURE, if the module does not detect a voltage from the warning light terminal on the
auxiliary charge alternator the
icon will illuminate.
BATTERY LOW VOLTAGE, if the module detects that the plant DC supply has fallen below the low volts setting
level, the module will display:-
V
The Battery Low Voltage alarm is delayed by the Low DC Volts Delay timer.
BATTERY HIGH VOLTAGE, if the module detects that the plant DC supply has risen above the high volts setting
level, the module will display:-
V
The Battery High Voltage alarm is delayed by the High DC Volts Delay timer.
FAIL TO STOP, If the module detects the engine is still running when the ‘Fail to stop timer’ expires, then the
module will display:-
NOTE:- ‘Fail to Stop’ could indicate a faulty oil pressure sender - If engine is at rest check oil sender
wiring and configuration.
AUXILIARY INPUTS, if an auxiliary input has been configured as a warning the appropriate LCD segment will be
displayed:-
!
LOW FUEL LEVEL. If the fuel level detected by the fuel level sender falls below the low fuel level setting, a
warning will occur.
The
icon will illuminate.
4.2 ANALOGUE PRE-ALARMS
The following alarms are termed ‘pre-alarms’ as they pre warn the operator of a potentially more serious alarm
condition. For instance, if the engine temperature rises past the pre alarm level, a warning condition will occur to
notify the operator. If the temperature falls below this level, then the alarm ceases, and the set will continue to run
as normal. However if the temperature continues to rise until the coolant temperature trip point is reached, the
warning is escalated and a high coolant temperature shutdown is initiated.
During a pre-alarm condition, the warning symbol
is displayed on the LCD display, along with the appropriate
icon:
LOW OIL PRESSURE, if the module detects that the engine oil pressure has fallen below the low oil pressure pre-
alarm setting level after the Safety On timer has expired, a warning will occur.
The
icon will illuminate.
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