Security Lockout is activated when 5 consecutive attempts of PINs and RFID cards are used to unlock the Wooden Rim lock.
On the 5th invalid attempt (default setting), the lock will sound a warning, and will become unresponsive to both PINs and RFID.
To disable the Security Lockout, you may use the Master Bluetooth Unlock, or wait until the alarm ends before keying the correct PIN / using the right RFID card again.