If the corresponding LED flashes repeatedly when the door opening button is pressed without the door lock being activated, your Class 300EOS is in "Door opening button lock" mode. This means that the door release button is only active when there is an audio/video connection between the outdoor and indoor units. To deactivate the "Door Release Button Lock" mode: - Remove the Class 300EOS from the wall bracket - Remove the green power terminal block - Place the "Door Release Button Lock" microswitch located on the back of the Class 300EOS in the correct position - Reconnect the green power terminal block - Remount the Class 300EOS on the wall bracket These operations must be carried out by an authorized person.
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