Becker Centronic VarioControl VC420 Notice De Montage Et D'utilisation page 23

Deleting all transmitters (except master transmitter)
Press and hold the programming button on the master transmitter for 3 sec-
onds.
The shutter/awning/blind will 'nod' to confirm.
Press the programming button on the master transmitter once again and keep
pressed for 3 seconds.
The shutter/awning/blind will 'nod' to confirm.
Now press the programming button on the master transmitter again, this time
keeping it pressed for 10 seconds.
The shutter/awning/blind will 'nod' to confirm.
All transmitters (except master transmitter) have been successfully deleted
from the receiver.
Overwriting the master transmitter
Turn off the power supply to the VC420 and switch back on after 5 seconds.
The VC420 goes into programming mode for 3 minutes.
Note
To ensure that the new master transmitter is programmed in the de-
sired VC420 only, all other receivers which are connected to the same
power supply must be deactivated from the programming mode. To do
so, after switching back on the power supply, execute a control or stop
command using the transmitter for the given receivers.
Now press the programming button of the new master transmitter for 10 sec-
onds.
The shutter will "nod" to confirm.
The new master transmitter has been programmed and the old master transmit-
ter deleted.
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