CTI Products CCU-2 Channel Control Unit - Manual (Page 20)

CCU-2 Hardware Reference Troubleshooting
CTI Products, Inc.
68-11843-100 20
PROBLEM CAUSE
The CCU doesn't hold the
last state on power-up or
reset Check Option Switch 4. If it is up, the CCU will initialize this
state based upon Switch 3. See Table 4 – Initial State on Reset.
Set Switches 3 & 4 Down and reset the unit.
The CCU holds the last state
on power-up (and we need it
to come up in a known state) Check Option Switch 4. If it is down, the CCU will start up
using the previous state. If you need it to start up in a known
state (A or B), set the proper state on Switches 3 & 4 and reset
the unit. See Table 4 – Initial State on Reset for details.
The PC shows the receivers
from this CCU-2 module as
"Offline". Check the MCN cabling.
Also check that the CCU-2 address and the address for the
CCU-2 module in the PC database match.
In an engineered system (with routers and/or EXB modules) the
PC may have an improper address or the module might be
installed on the wrong MCN sub-network. Check the custom
system documentation for the proper settings and connections.
The ACT LED on the CCU is
off If you don't have a PC talking to the CCU module this is normal.
If you do have a PC that needs to connect to the CCU module,
try the suggestions in the "Offline" problem above.