74-06666-000-B 12/93
© 1993 Radionics
D9112 Installation and Troubleshooting Quick Reference
Page 4
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 the a POPIT module programmed for the
missing point number is connected to the data
expansion loop of the correct ZONEX module.
Points 9 to 71 connect to ZONEX module 1.
Points 73 to 135 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.
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.
Switch 12 ON for more
than one OctoPOPIT
connected to ZONEX
1 or ZONEX 2.
Switch 12 ON for
OctoPOPIT
connected to same
ZONEX as a D8125.
Connect only one OctoPOPIT with switch 12
ON to ZONEX 1 or ZONEX 2.
If ZONEX 1 or ZONEX 2 is connected to a
D8125, turn switch 12 OFF for all OctoPOPITs
connected to that terminal.
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.
Radionics recommends 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.
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
Security System Owner’s Manual
(71-06633-000) for test instructions.
(32 pages)
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