CEA7 CONTROL UNIT ALARMS | PAGE 35
BATTERY CHARGING ALTERNATOR FAILURE
The CEA7 control unit's battery charging failure alarm is associated with the
analogue input for the battery charging alternator voltage (DI). The voltage
measured via said input must exceed the set voltage threshold for detecting that
the engine has started (Thresholds table, parameter 21); otherwise, this battery
alternator failure alarm is activated.
Detection of the battery alternator alarm is set by default (Alarms table,
parameter 10) to be activated: From detection that the engine has started A
battery alternator failure alarm can be associated a debounce time (Alarms
table, parameter 11) during which the voltage measured via the DI input must be
kept below the detection threshold for the started engine as a condition causing
the activation of the battery alternator failure alarm. The battery alternator failure
alarm is set by default (Alarms table, parameter 12) to perform no action
(warning).
STARTING FAILURE
The CEA7 control unit's starting failure alarm is generated if the number of
consecutive retries (Times table, parameter 1) and failures is exceeded during
engine start. Between each start attempt a programmable delay is observed
(Times table, parameter 2). Once the alarm has been generated the control unit
waits for the notication by the user before retrying the engine starting process.
LOW WATER LEVEL
The CEA7 control unit's low water level alarm is associated with the digital input
specically provided for low water level (NA). The status of this input must be
validated during a time interval (Times table, parameter 18) for stabilisation
(debounce) before generating the low water level alarm. It can be congured as
normally open or normally closed (Regulations table, parameter 8). Detection of
the low water level alarm is set by default (Alarms table, parameter 16) to be
activated: Always.
A low water level alarm can be associated with a time (Alarms table, parameter
17) to delay the moment at which the alarm begins to conrm the alarm
conditions. The low water level alarm is set by default (Alarms table, parameter
18) to always perform an immediate stop of the engine if it is not already
stopped.
LOW OIL PRESSURE
The CEA7 control unit's low oil pressure alarm is associated with the digital input
specically provided for low oil pressure (BPA). The status of this input must be
validated during a time interval (Times table, parameter 16) for stabilisation
(debounce) before generating the low oil pressure alarm.
It can be congured as normally open or normally closed (Regulations table,
parameter 6).
The low oil pressure alarm is set by default (Alarms table, parameter 4) to be
activated when it is detected that the engine has been started.
A low oil pressure alarm can be associated with a time (Alarms table, parameter
5) to delay the moment at which the alarm begins to conrm the alarm conditions.
The low oil pressure alarm is set by default (Alarms table, parameter 6) to always
perform an immediate stop of the engine.
EMERGENCY STOP
The CEA7 control unit's emergency stop alarm is associated with the digital input
specically provided for emergency stops (PEM o SETA).
It can be congured as normally open or normally closed (Regulations table,
parameters 11 and 15).
Similarly, the emergency stop alarm is also associated with the SETA input of the
measurements module; said input cuts power to the power outputs of the
measurements module (engine startup, preheating and stops) ensuring the
engine shutdown is set as stop via de-energisation (Regulations table, parameter
18) independently of the control unit's electronics. With engines set to stop while
powered, the input must be connected to the battery negative.
The emergency stop alarm always executes the engine shutdown without cooling.
It is not possible with this action to associate any delay time, set to engage
immediately after detecting the emergency stop input (PEM).
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