→SHP-DH537 Child lock feature

1. Press and hold the handle button

 

2. While pressing the handle button, push the pin using a pen

 

3. The pin should protrude like so
To test if this was successfully set up, close the door and press the button before pulling down the handle. If the door opened, the child proof feature has been successfully set up. If not, try to push the pin in the opposite direction.