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. . English UK Operator Controls and Displays On both control panel and remote keypad the LEDs display the following functions: a Glows steadily when mains power is present. E Shows the state of the entry/exit zone. 1 - 6 Shows the state of detector zones 1 to 6. T Glows steadily if the tamper loop is broken. D Glows when the system is unset, flashes when part set. The keypad on the control panel and 9427 provide the following keys: O Used to set the panel with individual zones temporarily