Radionics D9000 Series Installation And Troubleshooting Quick Reference page 5

Problems with Points
33317D 4/97
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(Continued)
Symptom Diagnosis
One or more The sensor loop is
points remain in open, shorted, or
trouble or alarm grounded.
with all devices
Opens,shorts, or
connected to the
grounds cause
sensor loops
troubles or alarms
normal.
depending on point
programming.
Faulted points do Sensor Reset pressed
not generate at the time the alarm
alarms or troubles or trouble was
as programmed. generated.
Two points are
programmed with the
same address.
Panel transmitts Short on D8125
PT BUS POPEX module's Data
TROUBLE Expansion Loop or
reports. short on D9412/D9112
Erroneous alarm ZONEX data terminals
and/or trouble (25 & 26, or 27 & 28).
reports may follow
PT BUS
TROUBLE report.
Erroneous alarm
and/or trouble
events for off-
board points
appear at
command centers.
The POPIT address
switches are set
incorrectly (for points
128 or 248) or the
OctoPOPIT address
switches are set
incorrectly (for points
121-128 or points 241-
248).
D9000/D7000 Series Installation and Troubleshooting Quick Reference
firealarmresources.com
Remove the sensor loop from the
D9412/D9112 or POPIT and meter it for
continuity. There should be no more than
100 ohm resistance, plus the value of the
end of line resistor on the wires. If you
meter less resistance than the value of the
end of line resistor, check the wiring for
shorts.
With the wires for the loop removed, meter
them for continuity to ground. A ground
before the end of line resistor on an on-
board point's sensor loop is interpreted as a
short. A ground on a sensor loop for a
POPIT point is interpreted as an open.
The D9412/D9112 ignores input from all
points in the same area programmed for
sensor reset during sensor reset.
Points programmed with the same address
do not function correctly. Check to be
certain that you have not duplicated point
addresses.
A short on either the Data Expansion Loop
or the ZONEX data terminals generates a
PT BUS TROUBLE report.
While the short remains, the panel responds
as though the sensor loop for each point
connected to the POPEX module was
shorted.
Check wiring for shorts.
Check to be certain all POPIT and
OctoPOPIT address switches are set
correctly. POPITs cannot be used for points
128 or 248 (these are reserved for panel
functions). OctoPOPITs cannot be used for
points 121-128 or 241-248.
Page 5
Remedy