You must silence the alarm devices before you can disable the alarms. 
        
            If there are devices in alarm which the panel can't reset, investigate the cause of
                the alarm. There could be a faulty or damaged device, a latched manual call point,
                or a latent fire condition. If the devices are damaged or cannot be reset, you can
                disable them with the yellow DISABLE button on the
                    ALARMS tab. This control disables only those devices
                currently in alarm.
            To disable any devices that are still in alarm:
        
        - 
                Press the yellow DISABLE button.
                
If the Alarm Devices are not silenced and you press the DISABLE control, a
                    reminder message is displayed. 
                Any points that are currently in alarm are selectively disabled, and
                    additional entries are added to the Disables
                    tab.
             - 
                After the points in alarm are disabled, press the RESET
                    button on the ALARMS tab to reset the panel from alarm. 
                
This takes 20 seconds. Alarms are cleared from the Alarms tab. Once the
                    points in alarm are repaired, they can be enabled for service on the Disables
                    tab. See 
Managing disables for more
                    information.