Several sensors are provided on the unit. If one of the measured signals exceeds the programmed
shutdown level, the unit will be stopped.
This will be indicated on display and the general alarm LED will blink.
Warning:
Before remedying, consult the safety precautions.
Before resetting a warning or shutdown message, an authorized technician should solve the
problem. If a warning or alarm persists to occur, consult your supplier. Frequently resetting
these messages without remedying may damage the unit.
Shutdown warning/shutdown
If the compressor element temperature exceeds the factory set warning level, the compressor
element will be stopped for a short time and a warning will appear on the controller display and the
general alarm LED will light up.
In case of repetitive stops due to a too high temperature, a manual reset will be necessary before
restarting the compressor.
The compressor will also be stopped when the motor is overloaded.
A warning message will also appear if, on compressors with integrated dryer, the dew point
temperature is too high in relation to the ambient temperature.
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.
The running hours will be recalculated with respect to the ambient temperature. This algorithm is
activated when the compressor is operated above 30 °C (86 °F) ambient.
Warning: Ignoring this service warning could severely damage your machine in the long
term. The supplier is not liable for failures caused by neglecting service interval timings.
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.
Warning:
If the function is activated and the controller was in the automatic operation mode before the
supply voltage was interrupted, the unit will automatically restart once the supply voltage to
the unit is restored. The ARAVF label shall be attached near to the controller.
Instruction book
2920 7219 10 25
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