Nugen Nugen S150PS, Operator'S Maintenance Manual

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OPERATOR & MAINTENANCE MANUAL
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5.8.2 Warnings
The warnings listed below are non-critical alarm conditions and do not affect the operation
of the generator, they serve to draw the operators attention to an undesirable condition.

Battery Charge Failure: If the PLC does not detect a voltage from the warning light
terminal on the auxiliary charge alternator, the screen will display ‘Charger gen’ on
the LCD. The Alarm LED will flash.

Low Battery: If the PLC detects that the plant DC supply has fallen below the low
voltage setting level, the screen will display ‘Low battery’ on the LCD. The Alarm
LED will flash.

High Battery: If the PLC detects that the plant DC supply has risen above the high
voltage setting level, the screen will display ‘High battery’ on the LCD. The Alarm
LED will flash.

Low Oil Pressure: If the PLC detects that the engine oil pressure has fallen below
the low oil pressure pre-alarm level after the run status timer has expired, the screen
will display ‘Oil pressure 1’ on the LCD. The Alarm LED will flash.

High Engine Temperature: If the PLC detects that the engine coolant temperature
has exceeded the high temperature pre-alarm level after the run status timer has
expired, the screen will display ‘Watertemp.1’ on the LCD. The Alarm LED will
flash.

Over speed: If the engine speed exceeds the pre-alarm level, the module will
display ‘Over speed 1’ on the LCD. The Alarm LED will illuminate steadily.

Generator High Frequency (Warning is configured): If the PLC detects a generator
output frequency in excess of the pre-alarm level, the screen will display ‘G over
frequency’ on the LCD. The Alarm LED will flash.

Generator Low Frequency (Warning is configured): If the PLC detects a generator
output frequency below the pre-alarm level after the Safety On timer has expired, the
screen will display ‘G under frequency’ on the LCD. The Alarm LED will flash.

Generator High Voltage (Warning is configured): If the PLC detects a generator
output voltage in excess of the pre-alarm level, the screen will display ‘G over
voltage’ on the LCD. The Alarm LED will flash.

Generator Low Voltage (Warning is configured): If the PLC detects a generator
output voltage below the pre-alarm level after the Safety On timer has expired, the
screen will display ‘G under voltage’ on the LCD. The Alarm LED will flash.

Phase Sequence Error: If the PLC detects a generator phase rotation error or
mains phase rotation error, the screen will display ‘Phase sequence error’ on the
LCD. The Alarm LED will illuminate steadily.

Auxiliary Inputs: If an auxiliary input has been configured as a warning, the screen
will display the appropriate message on the LCD. The Alarm LED will illuminate
steadily.