: Remove the battery cover from the indoor unit.
To change the master password on your digital door lock, follow these steps. For security, it is recommended to use a code that is 6 digits or longer . Steps to Change Password
password . Whether you’ve just moved in or want to refresh your security, updating your digital door lock PIN is a quick process that doesn't require a locksmith. Samsung EZON SHS-5120
typically uses and lasts about 12 months. Change them immediately when you hear the low-battery alarm to avoid being locked out.
: Press and hold the registration button for about 5 seconds . You should hear a sequence of beeps (Ding Dong -> Dingding -> Dingdingdingding).