The Bosch Solution unlock key CM255B will unlock any existing master code or Installers code, this chip will not default the existing panel programming settings. Model : CM255B Features The Bosch Panel Default Unlock Key will reset Installer PIN and RAS PIN on Solution series. Key will reset the installer code to default installer code (1234) No change to the programming. Works on 16 Plus, 64, 16i, 144, 6000 Allows panel default from installer lock out. one use only. Unlocks installers code add saves programming Works on 16 Plus, 64, 16i, 144, 6000 Compatible with all Digiflex Panels ✅ Steps to Use the CM255B Unlock Key (Single Use Only) Power Off the PanelDisconnect both AC power and the battery from the alarm control panel. Locate the Serial PortOpen the panel enclosure and locate the “Serial Port” (also known as the Direct Link Port). Connect the CM255BPlug the CM255B module into the serial port. Ensure it is correctly aligned (refer to panel diagram if unsure). Power On the PanelReconnect AC power first, then battery. Observe the LED Indicator Green LED only: Key is valid and ready to use. Red LED only: Key has already been used — discard. Alternating Red & Green flash: Factory default in progress. Remove the KeyOnce LEDs are flashing alternately, the reset is complete. Remove and discard the CM255B — it cannot be reused. Default Installer Code & MyAlarm SetupAfter using the key, the installer code will reset to 1234.This will allow you to access the menu and perform setup tasks, including: Go to Menu 509 Enter the 11-digit Installer ID Register the panel to the MyAlarm platform for remote access and management. Not compatible with 880, 862 or older series, Solution 2000, Solution 3000 Solution 16i (Complete Factory Default) Solution 16+ (Complete Factory Default) Solution 64 (Complete Factory Default) Shop CTC Communications for best deals Bosch Security Products