FBI XL21 / XL2S Codes
| Master Code | User 1 |
| Secondary Codes | User 2 to 5 |
| Hostage Code | User 6 (May not be enabled) |
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| Adding Code |
1. Press CODE key + Master Code (Keypad should beep) 2. Enter User to add (1 to 6) (Keypad should beep again) 3. Enter New 4-digit User Code (keypad should beep again) |
| Delete Code |
1. Press CODE key + Master Code (Keypad should beep) 2. Enter User to add (2 to 6) (Keypad should beep again) 3. Press * (keypad should beep again) |
| Master Reset |
1. Enter Programming 2. Press 7 and 9 together 3. Lights will flash and exit programming (Master is now 1234) |