Quadnet Control Panel Engineering and Commissioning Manual
58
25.
Open circuit: in –ve
core of loop
Investigate the loop for
-ve open circuit
An open circuit has been detected in the -ve core of the addressable
device circuit.
Stop the loop, wait at least 3 minutes and then reinitialise with one end
connected only. The initialisation will then stop at the relevant point.
Check connections and cable and reinitialise the loop. If it occurs again,
the base/backbox should be changed.
Once the loop can be fully initialised without the open circuit being
reported, stop the loop, wait at least 3 minutes and then reinitialise with
both ends connected as normal.
See “Initialisation Faults” for more information.
26.
Open circuit: input
xxx
Investigate the input for
open circuit
The input is in the open circuit state. Check that the 3k3 EOL resistor is
fitted, or that the EOL switch is turned on (loop devices only), but not both.
Check also that all cables are correctly connected and that the circuit is
complete.
Note. Even if the auxiliary I/O is set to its output state, it still monitors its
input circuit for EOL, and this is still reported as relating to the AUX input.
27.
Open circuit: output
xxx
Investigate the output for
open circuit
The output is in the open circuit state. Check that the 10k/3k3 EOL
resistor is fitted, or that the EOL switch is turned on (loop devices only),
but not both. Check also that all cables are correctly connected and that
the circuit is complete.
28.
Smoke sensor failed:
signal high
Investigate Optical
Chamber for
contamination
The current standing optical level (the level of reflection received by the
optical receiver within the Multipoint optical chamber, probably caused by
contamination) has risen as far as the automatic recalibration of the
device can allow, and a replacement optical chamber should be installed.
In the case of ASD detectors, which have an integrated chamber, it would
be best to replace the detector.
29.
Smoke sensor failed:
signal low
Investigate Optical
Chamber
The current standing optical level (the level of reflection received by the
optical receiver within the Multipoint optical chamber, probably caused by
contamination) has fallen as far as the automatic recalibration of the
device can allow. Check that the optical chamber is correctly locked in
place. If it was then a replacement optical chamber should installed. If this
still does not rectify the problem then a new electronics module should be
installed. In the case of ASD detectors, which have an integrated
chamber, it would be best to replace the detector.
30.
System fault
Repower and
reconfigure system
The control panel has detected a processor or memory fault. The system
may be working, but the problem should be dealt with immediately.
Power the control panel down to reset the fault, then re initialise and reset
before testing for correct operation.
31.
Uninitialised node,
address xxx
Investigate the device
and reinitialise
A device which was previously initialised, has requested initialisation
whilst out of the normal initialisation mode.
Either a device has reset and wished to be reinitialised, or a
new/replacement device has been connected whilst the loop is still live.
32.
Warning: optical
level high
Investigate Optical
Chamber for
contamination
The current standing optical level (the level of reflection received by the
optical receiver within the Multipoint optical chamber, probably caused by
contamination) has risen enough to be of concern, and it is suggested that
a replacement optical chamber is installed. In the case of ASD detectors,
which have an integrated chamber, it would be best to replace the
detector.
33.
Warning: optical
level low
Investigate Optical
Chamber
The current standing optical level (the level of reflection received by the
optical receiver within the Multipoint optical chamber, probably caused by
contamination) has fallen enough to be of concern. Check that the Optical
Chamber is correctly locked in place. If this does not rectify the matter it is
suggested that a replacement optical chamber is installed. If this still does
not rectify the problem then a new electronics module should be installed.
In the case of ASD detectors, which have an integrated chamber, it would
be best to replace the detector.
