Installation guide

EN | 49
D9124 | Operation & Installation Guide |
Bosch Security Systems | 11/03 | 39352E
12. Troubleshooting
12.7 Points
If the switches on a POPIT are set incorrectly, it can create both missing and extra points. When a missing point is
found, perform a Service Walk Test to search for extra points. See the Owner’s Manual for test instructions.
Table 21 identifies problems with points and describes how to troubleshoot them.
Problem Diagnosis Solution
•
POPIT is not connected or
incorrectly connected to the
data expansion loop.
•
Verify 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 VDC to 13 VDC at
each POPIT.
•
D8128D OctoPOPIT is
installed at the last address
on the ZONEX bus.
•
Install a D8125 POPEX and D9127 POPITs for points
121 to 127 on ZONEX 1 and for points 241 to 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.
Point appears as missing at
the command centers and in
reports to the receiver.
•
POPIT is not programmed
correctly.
•
Verify the switches on the POPIT are set for the missing
POPIT number. Incorrectly set switches can cause both
missing and extra POPITs.
•
Performing a Service Walk Test to search for extra points
can help diagnose the problem.
Problem with data expansion
loop.
See the troubleshooting information in
Section 12.8
D8125
POPEX Data Expansion Loosp .
Points intermittently appear
as missing. Points are
erratic.
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.
•
Leave the Debounce Count at the default of 2.
•
Decreasing the Debounce Count to 1 can cause points
to appear as missing. Increasing the Debounce Count
can cause missed alarms.
One or more points remain in
trouble or alarm with all
devices connected to the
sensor loops normal.
•
The sensor loop is open,
shorted, or grounded.
•
Remove the sensor loop from the control panel or POPIT
and meter it for continuity. There should be no more than
100
Ω
resistance, plus the value of the EOL resistor on
the wires. If you meter less resistance than the value of
the EOL resistor, check the wiring for shorts.
•
Opens, shorts, or grounds
cause troubles or alarms
depending on point
programming.
•
With the wires for the loop removed, meter them for
continuity to ground. A ground before the EOL 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 Sensor Reset was
pressed when the alarm or
trouble was generated.
•
No action is required because during a sensor reset the
control panel ignores input from all points in the same
area that was programmed for sensor reset.
Faulted points do not
generate alarms or troubles
as programmed.
•
Two points are programmed
with the same address.
•
Points programmed with the same address do not
function correctly. Confirm there are no duplicated point
addresses.
Table 21: Points