Manual

CTI Products, Inc. NCB-EL/FL User Guide
Appendix D. Troubleshooting 30
Table D5
If the ACT LED (on local
NCB) . . .
REASON CORRECTIVE ACTION
Occasionally blinks on, then
off.
Normal operation indicating a message
packet has passed through the router
module of the NCB.
Go to next Table.
Does not illuminate when
“RSVC” button on
remote
NCB is pressed.
1.
L
ON
W
ORKS
Service Pin message from
remote
NCB is not reaching the
local
NCB.
2.
L
ON
W
ORKS
Service Pin message from
remote
NCB is not passing through the
local
router module.
1a. Verify that “ACT” and “ERR” LED’s
on
remote
NCB flash once. If not,
return remote unit for
evaluation/repair.
b. Verify that “ETH TX” LED flashes on
the remote NCB and that “ETH RX”
LED flashes on the local NCB.
2a. Place the
remote
router in Repeater
mode and verify that the
local
“ACT”
LED illuminates when “RSVC” button
on
remote
NCB is pressed.
b. If ‘2a’ is ok, re-commission the
local
NCB router.
c. If ‘2a’ is not ok, swap either the local
or remote unit with a known-good-unit
to determine the faulty unit.
Does not illuminate when
local
L
ON
W
ORKS
nodes
are transmitting messages.
1.
L
ON
W
ORKS
message packets from
local
nodes are not passing through the
local
router module.
1a. Verify the connection between the
local
L
ON
W
ORKS
nodes and the
local
NCB.
b. Place the
local
router in Repeater mode
and verify that its “ACT” LED
illuminates when local
L
ON
W
ORKS
nodes are transmitting messages.
c. If ‘1b’ is ok, re-Commission the
local
NCB.
d. If ‘1b’ is not ok, return the
local
NCB
unit for evaluation/repair.
Does not illuminate when
remote
L
ON
W
ORKS
nodes
are transmitting messages.
1.
L
ON
W
ORKS
message packets from
remote
nodes are not passing through the
remote
router module.
2.
L
ON
W
ORKS
message packets from
remote
nodes are not reaching the local
NCB.
3.
L
ON
W
ORKS
message packets from
remote
nodes are not passing through the
local
router module.
1a. Verify the connection between the
remote
L
ON
W
ORKS
nodes and the
remote
NCB.
b. Verify that “ACT” LED on
remote
NCB illuminates when
remote
L
ON
W
ORKS
nodes are transmitting
messages.
c. Place the
remote
router in Repeater
mode and verify that its “ACT” LED
illuminates when
remote
L
ON
W
ORKS
nodes are transmitting messages.
d. If ‘1c’ is ok, re-commission the remote
router.
e. If ‘1c’ is not ok, return unit for
evaluation/repair.
2. See this Table above and verify step
“ACT” LED “Does not illuminate
when “RSVC” button on
remote
NCB
is pressed”.
3. See this Table above and verify step
“ACT” LED “Does not illuminate
when “RSVC” button on
remote
NCB
is pressed”.