FRE, FPE, Fault relay Fault
These are the other panel outputs, faults on these could be:-
End of line resistor not fitted.
Output line is shorted.
NOTE: If all of the above faults are displayed and all outputs have their monitoring resistors in place
the issue may be related to Loop controller 1 or in very rare occasions the Motherboard.
The panel fails to auto-learn past a device
This may be seen with short or open circuit on the loop, the problem will probably be located at the
last device detected or the next one along. See the above on open circuit positive/negative.
If there is no associated open circuit the device may be faulty, link out the device after the last one
auto-learned and try again. If this fails link out the last device detected and auto learn again. If either
device is causing the problem, replace it.
Once the faults have been removed from the panel and it shows system healthy after a reset go to the
system details screen and check the numbers of devices on each loop is the same as what has been
installed on each loop (spur isolators do not show on system details). If this number is less than
expected the following may be the cause: -
If spur isolators are fitted the spurs may not be correctly installed. To check this do test device on
what should be the last device on each spur (see locating a fault below), if the incorrect device LED is
on work back along the spur with test device until a device is correctly identified. The problem may be
that device or the next one along the spur, see open circuit negative/positive above.
If no spur isolators are present or the spurs are all working, ensure the site devices have all been
connected to the loop.
Locating a fault on a loop
If the fault is a short circuit middle or an open circuit on the loop the check auto-config function can be
used. This is in the supervisor level on the others section of the display. When this function is used
the panel will go around the loop from the start until it cannot communicate with a device it will then
show an open circuit at an address, this will help locate a short/open circuit in the middle of a loop. If
check auto-config shows a fault at the end of the loop but no short or open can be found, the problem
may be a resetting detector, see 'loop voltage drop' above in “Open circuit” Positive/Negative section
above. Alternatively run the Intermittent fault search in the high-level menu.
If an address is suspected as being faulty or dual addressed the test device function can be used to
locate the device. Test device is in the engineer level under testing. When a device is put into test its
LED should light up, two will light up if both devices have the same address. If the tested device is a
sounder, it will sound continuous. Sometimes the faulty device will not respond if this is the case test
the device before the faulty one and the one after the faulty one to help locate the exact device.
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