About the Coupler service menu
There are two ways to enter the coupler services.
Select from the tool bar the coupler service button.

click the coupler service button
step 1: click on Online in the menu bar.
step 2: hover onto Coupler and click Services.

Coupler Service menu:

Write protection set: enables the write protection of the coupler
Write protection abolished: disables the write protection of the coupler
Reset KBus: does a K-bus reset
Factory settings: does a software reset to default settings
Get Checksum: does a checksum test
Reboot: does a hardware reset and reboot
Click Exit to leave the coupler service menu.