SHP-DH537 - How to change the master PIN code

  1. Unlock and open the door
  2. Take the battery cover off
  3. Press the [REG] button to start registration : Ding Dong
  4. Enter the master pin code (default is 1234) + *
    • Success : Ding Dong Deng, Ding ding
    • Failed : Dingdongdingdong (If it’s wrong)
  5. Enter  0 + * 
  6. Enter the new master pin code + *
    • Success : Ding Dong Deng
    • Failed : Dingdongdingdong (if it’s same as current master PIN code or less digits)