User's Manual

3-4 InterReach Unison Installation, Operation, and Reference Manual PN 8700-10
620003-0 Rev. B
3.1.3 LED Indicators
The unit’s front panel LEDs indicate faults and commanded or fault lockouts. The
LEDs do not indicate warnings or whether the system test has been performed. Only
use the LEDs to provide basic information or as a backup when you are not using
AdminManager.
Upon power up, a Main Hub that has a band programmed into it goes through a
five-second test to check the LED lamps. During this time, the LEDs blink through
the states shown in Table 3-2, letting you visually verify that the LED lamps and the
firmware are functioning properly.
Main Hubs are shipped without a band programmed into them. Upon power up of an
unprogrammed Main Hub, its LEDs blink continuously. If upon initial power up the
LEDs do not blink continuously, then there is a band programmed in the Main
Hub and you should check that it is the correct band before connecting any
Expansion Hubs to it (refer to the AdminManager User Manual, PN 8810-10). Oth-
erwise, the Main Hub will automatically send the program band command to all con-
nected Expansion Hubs and RAUs. A mismatched band will cause an error message
to be displayed in AdminManager and the RAU will have a fault condition.
NOTE: Refer to Section 9 for troubleshooting using the LEDs.