Bosch D9412GV2 Troubleshooting Manual page 27

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Is there only one OctoPOPIT on the system with
the termination switch in the ON position (refer to
Figure 15 on page 27)?
On the D8128C, the termination switch is
Address DIP Switch 4.
On the D8128D, the termination switch is
Address DIP Switch 5.
Ensure that only one OctoPOPIT has its
termination switch in the ON position.
Is the OctoPOPIT wired correctly (refer to
Figure 17 on page 29)?
Fix the faulty wiring.
Set your digital voltmeter (DVM) to VDC. Put the red
lead on the D8125's AUX terminal. Put the black lead
on the D8125's GND terminal.
If the point expansion technology is powered
from an auxiliary power supply, ensure that the
auxiliary power supply shares a negative (-)
common reference with the control panel. Refer
to Figure 16 on page 28.
Does the DVM read 12 VDC to 13 VDC?
Refer to TTP51 Device or
Have Power on page 111.
Remove all wiring from the zonex bus. Uninstall the
OctoPOPIT with the missing points and wire it
directly to the control panel's zonex bus. Connect
+Aux Power from the control panel to the
OctoPOPIT. View point status again.
Are points still missing?
Set DVM to read resistance. Disconnect the
zonex wires leading to the D8128C or
D8128D. Connect the red DVM lead to one
conductor and the black DVM lead to the
other conductor.
•
If the resistance reads as an open circuit
on the DVM, refer to
on page 100.
•
Otherwise, refer to
on page 102.
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Bosch Security Systems, Inc. | 11/05 | F01U011024B
D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
Module Does Not
TTP47 Open Wiring
TTP48 Noise on Wire
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Disconnect the OctoPOPIT from the control panel.
Configure a different OctoPOPIT with the same
address and termination settings as the original
OctoPOPIT, then wire the OctoPOPIT directly to the
control panel's zonex bus.
Are points still missing?
Replace the original OctoPOPIT.
Replace the control panel.
•
If the OctoPOPIT is a D8128D, confirm that the point
DIP switches are configured to turn the desired zones
ON (Figure 15).
•
If the problem still exists, then there is noise on the
wiring. Refer to TTP48 Noise on Wire
Figure 15: D8128D DIP Switches
1 2 3 4 5 6 7 8
P O I N T S
on page 102.
Address DIP Switches
Point DIP Switches
27