Atlas Copco ZR 200 Instruction Book page 27

Instruction book
Protecting the unit
Shutdown
Several sensors are provided on the unit. If one of the measured signals exceeds the
programmed shutdown level, the unit will be stopped.
Example: If the element outlet temperature exceeds the programmed shutdown level, the unit will
be stopped. This will be indicated on the display of the controller.
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.
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
A number of service operations are grouped as a Service Plan. Each Service Plan has a
programmed time interval. If the service timer exceeds a programmed value, this will be indicated
on the display to warn the operator to carry out the service actions belonging to that Service Plan.
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. If desired, the function can be
activated. Consult your supplier.
AIF999999
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.
If the function is activated and provided the regulator was in the automatic operation
mode, the unit will automatically restart if the supply voltage to the module is restored.
The ARAVF label shall be glued near to the controller.
Safety precautions.
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