Installation manual

D9124 Operation & Installation Manual
Page 54
© 1995- 1996 Radionics
74-06799-000-D 2/96
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 D9124 or
POPIT and meter it for continuity. There
should be no more than 100Ω resistance, plus
the value of the end of line resistor on the
wires. If you measure less resistance than the
value of the end of line resistor, check the
wiring for shorts.
With the wires for the loop removed, measure
them for leakage 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 D9124 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 transmitts 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
control centers.
Short on D8125
POPEX module’s Data
Expansion Loop or
short on D9124’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.
A POPIT has its
address set incorrectly
and it’s sensor loop is
shorted.
Check to be certain all POPIT addresses are
set correctly.
An OctoPOPIT
assigned to points 65
to 71, or 129 to 135
has switch 8 turned
on. Sensor loop is
shorted
Check to be certain that switch 8 is turned of
for any OctoPOPIT assigned to points 65 to 71
or 129 to 135.
The D9124 reserves points 72 and 136 for
monitoring the ZONEX Point Bus (Data
Expansion Loop).