Fault Finding
The TS2500 has various diagnostic functions to help you
in fault finding the system. To access these functions go
to Engineer’s Menu 3 option 9. The most useful of these
functions are number 7 - Confirm Network devices and
no 9 + A +
[
- View Network Devices and Network
Errors.
One of the most difficult of faults to find is when the
control panel looses communication with an item of
remote equipment, for example an xnode. This may be
caused by one of the following problems: network
equipment faulty, power supply faults, earthing faults, or
cabling faults.
1. Use Network Errors to check if you have any data
problems. The keypad displays the location of the last
device problem, for example:
NETWORK 1 0010
LAST ERROR 2,07
2. Press 0 to reset the error counter.
3. Power down and disconnect the node indicated in
the display (2,07 in the example shown above).
Re-attach the network cable so that the rest of the
newtwork is still connected to the control panel.
4. Re-apply power. The keypads display the “Relearn
Required” message. Confirm the new number of
network devices connected as described in the TS2500
Installation Manual.
5. Repeat steps 1 and 2 to check wether there are any
data errors. If there are no errors then the node you have
disconnected is faulty
4. If there are still errors then the problem may be with
the previous node.
If you cannot isolate the fault to one item of equipment
it is possible that the dc power supply to the remote
equipment is low. Starting at the end of the network
farthest from the panel put your meter to low DC and
connect the black lead to A and the red lead to B. The
meter should read at least 12V all along the network
line.
If the meter reads less than 12V then you may need to
decrease the resistance of the cables by doubling up,
or adding a remote power supply.
If the power supply voltage is adequate check for
earthing faults. Set your meter to low ac and connect
the black lead to earth and the red lead first to A and
then to B.
The meter should read no higher than 1V. If the reading
is higher then you have ac hum on the dc line. Fit an
appropriate filter.
While the black lead is still connected to earth set the
meter to low dc. Connect the red lead to A and then to
B.
If the meter shows a stable reading greater than about
0.5V then you may have a short to earth. Check the
entire length of the cable for wiring faults or damage, for
example staples through the cable.
Please note that some power supplies have a
grounded printed circuit board. If one of these is
connected to your network then you will have earthing
problems. We recommend using our TSPS1 and
TS519.XB power supplies.
If none of the problems above exist then check the
continuity of the cable.
If all else fails then power down the panel and connect
a single xnode to the panel on a short length of cable.
Power up the panel. The keypads display the “Relearn
Required” message. Confirm that only one device is
connected, as described in the TS2500 Installation
Manual. Check again for network errors. If the keypad
still displays network errors then power down again and
connect the xnode to another network. Power up,
confirm that only one xnode is connnected and check
again for network errors. If the errors have gone then the
control panel has got a faulty network.
7
TS2500 Hints and Tips
