TWINFLEX
®
pro² Control Panel Engineering and Commissioning Manual
63
False Alarms
1.
Dirty or contaminated optical chambers. Replace with a new optical chamber or device.
2.
Incorrectly set smoke detector (smoke is not suitable for kitchens, bathrooms, boiler
rooms etc., however, SM3 may be suitable outside a bathroom or kitchen but the
individual situation needs to be looked at very carefully). Incorrectly set heat detector
(HM1 is not suitable for kitchens, and HM3 should be kept for hotter areas such as plant
rooms and commercial kitchens)
3.
Faulty detector. Replace with a new one.
4.
Ensure that the Optical Chamber is installed when the system is powered up, or a fault
condition will be generated. This could translate into a false alarm, depending on the
state of the detector.
General Faults
1.
Sounder fault LED – this only activates for a fault on the conventional sounder circuit so
check for O/C, S/C and 10k EOL resistor.
2.
Remote Fire Output fault LED – this only activates for a fault on the Remote Fire Output
so check for O/C, S/C and 10k EOL resistor. Check also that the relay used has the
correct polarisation and suppression diodes installed.
3.
Power fault - mains fault – Check that the 230V AC mains supply is live and the fuses
are healthy.
4.
Power fault, battery or charger fault – Check that the correct batteries are installed, the
fuse has not blown and that the mains supply is live.
5.
Earth fault. One of the circuits is connected to ground. Remove them one at a time until
the relevant circuit is found, following which an electronic test meter may be used to
track the problem.
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