Troubleshooting
February 2012 7-20 P/N 06-237058-001
MODEM INITIALIZATION FAULT The DACT module could not initialize • Re-initialize the control unit by first
removing, and then re-applying,
primary and secondary power
sources
• Functionally test the system
• Replace the DACT if steps above are
unsuccessful.
MODEM CONFIGURATION FAULT The DACT module was unable to
configure its modem chip
• Re-initialize the control unit by first
removing, and then re-applying,
primary and secondary power
sources
• Functionally test the system
• Replace the DACT if steps above are
unsuccessful.
CH1 COMMUNICATION FAULT : N#
CH2 COMMUNICATION FAULT : N#
A networked control unit (N#) has
failed to communicate on the specified
channel 1 or 2
• Verify proper network wiring and
connections between control units.
• Ensure that network wiring is daisy-
chained and not T-Tapped.
• Check network wiring for excess
resistance or capacitance.
• Check node N# for any fault events
associated with that node's NIC.
• Confirm proper network settings on
N# and the node reporting the fault
• Correct parameters via the control-
unit menu options or re-upload
corrected configuration again
CH1 TOKEN NOT RECEIVED
CH2 TOKEN NOT RECEIVED
The control unit is not receiving the
network communication token, so it
cannot transmit status events to other
nodes.
• Verify proper network wiring and
connections between control units.
• Ensure that network wiring is daisy-
chained and not T-Tapped.
• Check network wiring for excess
resistance or capacitance.
• Check node N# for any fault events
associated with that node's NIC
• Check the configuration of other
control units to be sure the node is in
the node map
• If the node is missing from the node
map, use the panel menu option to
add that node to the network.
• If the node should not be in the node
map, disconnect the wiring to/from
the control unit and use the panel
menu option to remove that node
from the network.
Table 7-5. Other Card-Related Events
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