NANO VDR 2600, Instruction Book, Page: 34 / 96

Several sensors are provided on the unit. If one of the measured signals exceeds the programmed
shutdown level, the unit will be stopped.
The unit will shut down if:
• The pressure in the refrigerant circuit is too high
• The compressor of the dryer overloads
• The fan motor overloads (air-cooled units)
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.
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 contact your supplier
to schedule the necessary maintenance actions.
If the unit is equipped with a voltage surge protector device (F99): Replace the damaged cartridges
as soon as possible, to avoid damage to the frequency converter if the voltage surge alarm warning
appears.
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.
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 (see section Pictographs) shall be glued near to the
controller.
3.2 Control panel
Instruction book
32 2987 2020 00