Atlas Copco GA 11+ Instruction Book page 27

Instruction book
Protecting the unit
Shutdown
If the element outlet temperature exceeds the programmed shutdown level, the unit will be
stopped.
The unit will also be stopped in case of overload of the drive motor or fan motor.
Shutdown warning
A shutdown warning level is a programmable level below the shutdown level.
If one of the measurements exceeds the programmed shutdown warning level, a message will
appear on the display and the general alarm LED will light up to warn the operator before the
shutdown level is reached.
The message disappears as soon as the warning condition disappears or after a manual warning
reset on the display.
A warning will also appear if the dew point temperature is too high in relation to the ambient
temperature (on units with integrated dryer).
When the shutdown warning is shown, press stop button to stop the unit and wait until the unit
has stopped. Switch off the voltage, inspect the unit and remedy if necessary. The warning
message will disappear as soon as the warning condition disappears.
Service warning
The service timer has a programmed time interval. If the service timer exceeds the programmed
value, this will be indicated on the display to warn the operator to carry out the service actions.
When the service warning is shown, stop the unit, switch off the voltage and carry out the
required service actions. See section Preventive Maintenance.
Automatic restart after voltage failure (ARAVF)
The controller has a built-in function to automatically restart the unit when the voltage is restored
after voltage failure. For units leaving the factory, this function is made inactive.
To activate this function, you have to change the Access level to 'Service user'. This profile is
password protected. See
Consult your supplier.
2920 7118 31
Before remedying, consult the
Before resetting a warning or shutdown message, always solve the problem. Frequently
resetting these messages without remedying may damage the unit.
Controller settings
If the function is activated and provided the controller was in the automatic operation
mode, the unit will automatically restart if the supply voltage to the module is restored.
The ARAVF label (see section Pictographs) shall be glued near to the controller.
Safety precautions.
menu.
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