Installation guide

SZ-DOC-W5-1.pdf LTU/NTU
Version: 1.5 Operating Manual
113 Revision: 2002-09-10
7. On the LTU, the Status LEDs of the addressed system will blink amber when ready for
download, and green when download is in progress
8. On the NTU, the Status LED will blink red when the Flash Memory’s secondary image is being
erased, amber when ready for download, and green if download is in progress
9. If download completes successfully, the NTU will break the link, copy the new program from
the secondary to the primary image of the Flash Memory and restart the link with the new
application FW stored in the primary image.
10.If download fails (e.g. link disconnection), the LTU will return to normal operation and the
NTU will restart with the old application program.