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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.
A warning will also appear if the dew point temperature is too high (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
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 contact your supplier
to schedule the necessary maintenance actions. See section Preventive maintenance schedule.
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.
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It is possible to program a number of time-based commands for automatic start/
stop. Take into account that a start command will be executed (if programmed
and activated), even after manually stopping the unit.
Before remedying, consult the Safety precautions.
Before resetting a warning or shutdown message, always solve the problem.
Frequently resetting these messages without remedying may damage the unit.
Instruction book
2920 7196 21
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