D9000/D7000 Series Installation and Troubleshooting Quick Reference
Page 4
33317D 4/97
Problems with Points
If you incorrectly set the switches on a POPIT you may create both a missing and extra
point. When you find a missing point, perform a Service Walk Test to search for extra
points. See the
Owner’s Manual (71-06150-000) for test instructions.
Symptom
Diagnosis
Remedy
Point appears as
missing at
command centers
and in reports to
the receiver.
POPIT is not
connected or
incorrectly connected
to the data expansion
loop.
Verify that a POPIT module programmed for
the missing point number is connected to the
data expansion loop of the correct ZONEX
module. Points 9 to 127 connect to ZONEX
module 1. Points 129 to 247 connect to
ZONEX module 2.
Meter each POPIT to verify the polarity of the
data expansion loop. Voltage should be 9 to
13 VDC at each POPIT.
D8128C OctoPOPIT is
installed at the last
address on the
ZONEX bus.
Install a D8125 POPEX and D9127 POPITs
for points 121-127 on ZONEX 1 and for points
241-247 on ZONEX 2.
Sensor loop switch (1
to 8) is turned off on
OctoPOPIT.
If the sensor loop switch on an OctoPOPIT is
turned off for a programmed point, the point
reports as missing.
POPIT is not
programmed correctly.
Verify that the switches on the POPIT are set
for the missing POPIT number. Switches set
incorrectly can cause both missing and extra
POPITs.
Performing a Service Walk Test to search for
extra points may help diagnose the problem.
Points
intermittently
appear as
missing. Points
are erratic.
Problem with data
expansion loop.
See
Problems with Data Expansion Loop.
Debounce Count
parameter set at 1. If
an off-board point is in
transition between
normal and faulted
conditions as the
panel scans it, it
appears as missing.
It is recommended that the Debounce Count
be left at the default of 2.
Decreasing the Debounce Count to 1 may
cause points to appear as missing. Increasing
the Debounce may cause missed alarms.
www.PDF-Zoo.com
firealarmresources.com
