D9000/D7000 Series Operation & Installation Manual
Page 49
74-07692-000-C 4/97
Problems with Points (Continued)
Symptom
Diagnosis
Remedy
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.
Opens, shorts, or grounds cause
troubles or alarms depending on
point programming.
Remove the sensor loop from the panel 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.
Faulted points do not
generate alarms or
troubles as
programmed.
Sensor Reset pressed at the
time the alarm
or trouble was generated.
The panel ignores input from all points in the same area
programmed for sensor reset during sensor reset.
Two points are programmed with
the same address.
Points programmed with the same address do not function correctly.
Check to be certain that you have not duplicated point addresses.
Panel transmits PT
BUS TROUBLE
reports. Erroneous
alarm and/or trouble
reports may follow PT
BUS TROUBLE report.
Erroneous alarm and/or
trouble events for off-
board points appear at
command centers.
Short on D8125 POPEX
module’s Data Expansion Loop
or short on panel’s ZONEX data
terminals (25 & 26, or 27 & 28).
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.
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).
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.
All off-board points are
MISSING.
Short on Aux Power, terminal 3
or ZONEX power, terminal 24.
Terminals 3 and 24 share a common circuit breaker. Check wiring
and devices connected to these terminals for shorts or grounds.
If only one POPEX module is
connected to the panel, POPEX
module may be incorrectly
connected to the panel or Data
Expansion Loop may be
disconnected from POPEX
module.
Check POPEX module for correct connections to the panel and the
Data Expansion Loop.
If you find missing points, the service walk test may help you
diagnose the problem (see Extra Points below).
Keyswitch points (
P##
Type
is programmed
as 4, 5, 6, 7, or 9)
report as missing. If
area is armed, the point
reports a MISSING
ALARM. If the area is
disarmed, the point
reports a MISSING
TROUBLE.
Point is disconnected from the
SDI data bus.
The POPIT cover may have
been removed and not replaced
or the cover is not seated
properly.
The point will restore when the SDI bus is reconnected or when the
POPIT cover is seated firmly on the POPIT.
Connected points show
as extra points when
the point bus is shorted
beyond the
programmed debounce
time.
The points have no point index
programmed.
This will be corrected when the short is returned to normal.
Extra Points
If the panel is not in the service walk test mode
when an extra point trips, the panel responds to it
as a local TROUBLE event at the Command
Center or central station (see
Routing in the
Program Entry Guide). It displays the custom text
for the point number set in the point’s dipswitch
or on-board point location.
When an extra point is tripped during the service
walk test, it reports as an EXTRA point in the
panel’s event log and at the local printer (if
installed). Once an extra point is identified you
can check the programming to see if it has a
Point Index programmed. You can then
determine if the point index is appropriate for the
application and that the area assignment is
correct.
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