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Summary

Steps on factory resetting a GT-DM or GT-DMA Entrance Station.

 

Solution

  1. Turn on all switches (1-4) of SW1 and switches 2, 3, and 4 of SW2.
  2. Turn on the power while pressing down the up and down arrow buttons.
  3. Release the up arrow button after a beep is emitted and “Blue back” is displayed.
  4. Release the down arrow button.
  5. Press the X and Bell buttons.
  6. “DELETE” is displayed during the initialization.
  7. “Voice sentence” will be heard and the display turned off when it is done.