D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
30 Bosch Security Systems, Inc. | 11/05 | F01U011024B
TTP12: Point Trouble and the D8125
POPEX with D8126, D8127, or
D9127 POPITs Is Connected to the
Control Panel
A B C D E
Initial Actions
Ensure that Zones 9 to 127 are wired to ZONEX 1 and
that Zones 129 to 247 are wired to ZONEX 2.
If this symptom exists on both zonex buses, perform this
TTP separately for each bus.
Procedure
Are ALL points connected to the D8125 missing?
Are ANY points connected to the D8125 missing?
1. Select an addressable point or POPIT that
is in trouble.
2. View Point Assignments for the point you
are troubleshooting to determine which
point index the point is using.
3. View that point index to determine the type
and point response (for more information,
refer to Table 17 on page 32).
Is the point programmed to respond as
desired?
Fix the programming problem.
For the affected point, set your digital voltmeter
(DVM) to read VDC. Connect the red DVM
lead to the LOOP + side of the POPIT.
Connect the black DVM lead to the LOOP -
side of the POPIT.
Does DVM read <5.0 VDC or > 7.0 VDC?
Remove all wires from the POPIT loop.
Set the DVM to read resistance.
Connect the red DVM lead to one
conductor and the black DVM lead to
the other conductor.
Does it read >34 kΩ or <32 kΩ?
A B C D E
Remove the POPIT from the
POPIT data bus. If this is not the
last POPIT on the line, splice the
wires together. View point status
for the point again.
• If the point is missing, there
is a wiring problem. Refer to
TTP48 Noise on Wire on
page 102.
• If the point is not missing,
there is another addressable
module that shares the same
address with this POPIT.
Refer to TTP21 Extra Points
on the System on page 60
for additional troubleshooting
steps.
There is a wiring problem. Refer to
TTP50 Unexpected Voltage on On-
board Point Wiring on page 108.
Connect a 33 kΩ resistor to the addressable
point. Repeat the voltage check.
Does the DVM still read <5.0 VDC or >7.0
VDC?
Replace the POPIT.
• If the voltage reads <5.0 VDC, refer to
TTP46 Shorted Wiring on page 98.
• If the voltage reads >7.0 VDC, refer to
TTP47 Open Wiring on page 100.
Select a missing point. Refer to
Table 18 on page 32.
Is the address correct for the missing point?
Fix the addressing problem.
Remove all wiring from the POPEX that is connected
to the missing point. Connect the POPIT directly to
that POPEX. View Point Status again.
Is the point still missing?
• If the missing POPIT is between two
working POPITs, refer to
TTP48 Noise
on Wire on page 102.
• If the missing POPIT is the last POPIT on
the POPIT data bus, refer to
TTP47
Open Wiring on page 100.
Replace the POPIT.
A
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