DoorKing 1812 Plus - Manual (Page 34)

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2.7 Miscellaneous
2.7.1 Restore Factory Settings
This step will restore the factory settings for each of the programming parameters. See the “Quick Reference Table” on
page 22 for all of the factory settings. The master code will remain intact after the factory settings have been restored.
WARNING: Once started, this sequence will program ALL values to factory default.
1. Press * 9 0 and enter the MASTER CODE. [ * 9 0 _ _ _ _ (beep)]
2. Press 9 9 9 9, then press * . [ 9 9 9 9 (beep)]
3. The programming sequence will end itself automatically. [beeeeeep]