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7.2.6 Fault chart
The table below lists all the faults which can be recorded in the stack.
symbol description
Emergency stop: appears when the user presses the emergency stop button, located on the central console on the
enclosure, or at the entrance to the electrical room.
Low fuel level: appears when the daily service tank reaches the low fuel level threshold
Low oil pressure: appears if the engine oil pressure is too low (less than or equal to 1 Bar) or if the binary input is
active.
High coolant temperature: appears if the engine coolant temperature is too high (above the activation threshold).
Overspeed: appears if the generating sets the exceeds 120% of nominal speed. The safety feature is set at 150% for
5 seconds on generating set start-up.
Under speed: appears when, after a full start-up, the generating set stops automatically after operating correctly for at
least 5 seconds.
Max. alternator voltage (59): appears when the alternator voltage reaches or exceeds the set threshold (parameter
G01), after a delay of 3 seconds.
Min. alternator voltage (27): appears when the alternator voltage reaches or dips below the set threshold (parameter
G02), after a delay of 3 seconds.
Max. alternator frequency (81H): appears if the alternator's frequency reaches or exceeds the set threshold
(parameter G03), after a delay of 3 seconds.
Min. alternator frequency (81): appears when the alternator frequency reaches or dips below the set threshold
(parameter G04), after a delay of 3 seconds.
Alternator short-circuit (50/51): appears if the current consumed by the alternator reaches or exceeds the set
threshold (parameter G05), after the delay G06 which can be adjusted.
Generating set start-up failure: appears if the generating set fails to start up after a full starting sequence.
Generating set shutdown failure: appears after a shutdown request in
mode, if the speed exceeds
2 rpm, or if the voltage exceeds 10V, or if the oil pressure remains higher than 3Bar, or if the generating set is started
up when no start demand has been given by the APM303. The safety feature is taken into account after fixed delay of
60 seconds.
Fault input no. x (x=1, 2 or 3): appears when the input configured in "fault x" is active (x takes values 1, 2 or 3).
Circuit breaker position inconsistent: appears if there is an inconsistency between the motorised command from the
circuit breaker and the position of the circuit breaker (open, closed), after a delay of 5 seconds.
Note: the figures between brackets (which may be accompanied by a letter) are the ANSI codes for the safety features (ANSI = American
National Standards Institute).
7.2.7 Other anomaly displays
An anomaly referring to a mechanical or electrical value can be viewed on screens 1, 2, 3 or 4.
E.g.: "low battery voltage" alarm displayed on screen
.
Parameter E06 (minimum battery voltage) is set at 20Volts.
The battery voltage value appears with inverted backlighting and is equal to
19.5Volts.
Figure 15 - an alarm displayed on the
measurements screen
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