55
Amended: Jan 2014
Detector not correctly inserted on base. If a detector is not fully inserted onto a base it is possible that
the base switch will not be opened. The newer detectors and bases have a tab to show when the
detector is fully inserted. See diagram below.
FIG 52
Base sounder device not wired correctly. When a detector is inserted onto a base sounder there is not
much room behind the detector. If the cabling is not cleared from the base, see images below.
INCORRECT
CORRECT
FIG 53
The detector may be pushed away from the base preventing the switch opening, or crushing a contact
and thus not receiving power.
The panel goes into fire straight after auto-learn.
Dual addressing, causing the panel to interpret a response signal as a fire.
This will show itself if there is a dual address fault at the same address as the fire (it will take longer
for the fault to show than the fire).
This is generated by adjacent devices one with a high analogue level dualling with a device with a low
analogue level (generally a smoke detector and an I/O unit)
