Atlas Copco QAS 275-325, Instruction Manual

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Underfrequency delay
Underfrequency setpoint
Alarm Display (pop-up window)
In case an Alarm occurs, a pop-up window will
automatically be displayed for as long as the alarm is
active, no matter which view is active. The flashing
red alarm LED will light up. The alarm icons will be
shown together with an acknowledgement check-box.
Push the ENTER button to acknowledge the alarm.
When the alarm has been acknowledged, a V-
marking will appear in the check-box and the red
alarm LED will light up continuously.
The Alarm Display can always be left by pushing the
BACK button.
If more than one alarm comes up, it's possible to scroll
through the alarm messages with the UP and DOWN
pushbuttons. The newest alarm will be placed at the
bottom of the list (meaning that the older alarm stays
at the display when a newer alarm comes up).
If one or more than one alarm is present, an arrow at
the right of the display will be shown.
Following general groups of Alarms exist:
– Warning: Alarm LED lights up + Alarm pop-up
appears on the d Alarm relay is
empowered (if configured)
– Trip of GB: ‘Warning’ a Generator
Contactor opens
– Trip and Stop: ‘Trip of GB’ a unit stops
after Cooldown
– Shutdown: ‘Trip of GB’ a unit stops
immediately
List of possible alarms:
< Freq Delay
0 1 99
< Freq SP
0 38 70
An alarm should always be
acknowledged before solving the
problem that causes the alarm.
LOW OIL
PRESSURE
HIGH COOLANT
TEMPERATURE
CHARGING
ALTERNATOR