CEC7 CONTROL UNIT ALARMS | PAGE 25
The detection of the maximum network voltage alarm can be congured (Alarms
table, parameter 88) as follows:
• 0: Not checked.
• 1: Checked and if an error is detected the engine is started.
A maximum network voltage alarm can be associated a debounce time (Alarms
table, parameter 89) during which the network RMS voltage must be kept above
the maximum threshold limit set (Thresholds table, parameter 13).
The detection of the maximum network voltage alarm is a genset starting
condition.
MINIMUM NETWORK VOLTAGE
The CEC7 control unit's minimum network voltage alarm is associated with the
condition that the measurement of the network's RMS voltage is lower than the
minimum voltage limit set (Thresholds table, parameter 14).
The phases which are evaluated for the detection of the minimum genset voltage
alarm are selected depending on the conguration of the installation phases
(Thresholds table, parameter 1):
• In a single phase con guration network voltage V1N is tested.
• In a two-phase con guration network voltage V12 is tested.
• In a two-phase selector con guration phases 1 and 3 are tested.
• In a three-phase con guration with neutral or three-phase without
neutral, network voltages V12, V23 and V13 are tested.
The detection of the minimum network voltage alarm can be congured (Alarms
table, parameter 90) as follows:
• 0: Not checked.
• 1: Checked and if an error is detected the engine is started.
A minimum network voltage alarm can be associated a debounce time (Alarms
table, parameter 91) during which the voltage measured must be kept below the
minimum threshold limit set (Thresholds table, parameter 14).
The detection of the minimum network voltage alarm is a genset starting
condition.
STOP FAILURE
The CEC7 control unit’s stop failure alarm is generated if 90 seconds have
elapsed after ordering the engine to stop and not all the stopped engine condi-
tions are detected (Regulations table, parameters 19 to 22).
In the event the stop failure alarm has been disabled (Alarms table, parameter
71), after waiting a maximum of 90 seconds for stopped engine conditions, the
control unit considers that the engine is stopped without generating a stop failure
alarm.
GENSET SIGNAL FAILURE
The CEC7 control unit's genset failure signal alarm is generated if no genset
voltage is detected during any phase while the engine is running.
Detection of genset signal failure alarm is set by default (Alarms table, parameter
76) to be activated: From the nominal condition of the engine.
A genset failure signal alarm can be associated a debounce time (Alarms table,
parameter 77) during which no signal must be detected during any phase before
activating the alarm.
The genset failure signal alarm is set by default (Alarms table, parameter 110) to
always perform a stop of the engine with cooling.
MAXIMUM NETWORK VOLTAGE
The CEC7 control unit's maximum network voltage alarm is associated with the
condition that the measurement of the network's RMS voltage is above the
maximum voltage limit set (Thresholds table, parameter 13).
The phases which are evaluated for the detection of the maximum network
voltage alarm are selected depending on the conguration of the installation
phases (Thresholds table, parameter 1):
• In a single phase con guration network voltage V1N is tested.
• In a two-phase con guration network voltage V12 is tested.
• In a two-phase selector con guration phases 1 and 3 are tested.
• In a three-phase con guration with neutral or three-phase without
neutral, network voltages V12, V23 and V13 are tested.
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