Theben TC 649 C Manual page 24

The update is downloaded and installed automatically. Once the update has
completed successfully, you will be redirected automatically to the login page.

The update will take 3 to 5 minutes. The web interface will not be
available during this time.
Do not disconnect the control box from the power supply during the
firmware update, as this may cause irreparable damage to the device.
Offline update
 Drag and drop the firmware package provided by Theben AG into the dashed
field.
 Then click on Start firmware update.
 Press Yes to confirm and carry out the update.
 The update is downloaded and installed automatically. Once the update has
completed successfully, you will be redirected automatically to the login
page.

The update will take 3 to 5 minutes. The web interface will not be
available during this time.
Do not disconnect the control box from the power supply during the
firmware update, as this may cause irreparable damage to the device.
TC 649 C manual
Controls and menu
24