Basic Programming Procedures i-on RangePage 14Either: press to put the control unit back intoInstaller Menu (so that you can go and check that allthe bus devices you have installed are connected,powered up and addressed correctly).Note: To check an expander address remove the lid andbriefly press the addressing button. The two digitdisplay will show the bus address for a few seconds.For example “b1” followed by “08” is “bus 1 device 08”.OR: Press to make the control unit update itsinternal record of devices attached to the bus.The display shows: Press to accept the change to the bus. (You can stillpress to return to the installer menu if you do notwant to change the number of devices on the bus.)Note: If you attempt to leave the Installer Menu when there is a fault (for example adetector, control unit lid, siren or keypad tamper is active, or the battery is missing)then the keypad displays a fault message telling you which device is causing theproblem. Press to return to the Installer Menu. You must rectify the fault (or deletethe device from the system) before you can leave the Installer Menu.Important! Saving ChangesWhen you make changes to the Installer Menu the control unit holds those changes intemporary memory until you leave the Installer Menu. As you leave the Installer Menu thecontrol unit writes those changes into a permanent store. If you remove all power BEFOREyou leave the Installer Menu then the control unit will lose your changes. Note that thisdoes not apply if you restore Factory Defaults; that change takes place immediately.Defaulting the SystemIf you wish to restore the control unit to its factory defaults then you must do this from akeypad. You cannot restore factory defaults from a connected PC. If Downloader isconnected to a control unit when you load factory defaults, or staged communicationdefaults then the control unit will drop the connection.Note that this procedure deletes all radio detector identities but preserves expander andkeypad addresses.Restoring Factory Defaults1. Enter the Installer Menu. 2. Press until the bottom line shows System Options: 3. Press .The display shows: