D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
50 Bosch Security Systems, Inc. | 11/05 | F01U011024B
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Fix the faulty wiring. Remove the cover from the FA400 Receiver.
Are the DECODE and VALID DECODE LEDs both
dark?
Remove all wires from the control panel
ZONEX IN and ZONEX OUT terminals except
for the wires connected to the D8125INV. At
the D8125INV, put the red digital voltmeter
(DVM) lead on the IN terminal that is
connected to the control panel. Put the black
DVM lead on the OUT terminal that is
connected to the control panel.
Does the DVM read a voltage that fluctuates
between 3 VDC and 12 VDC?
Check the voltage at the control panel
ZONEX IN and ZONEX OUT terminals
that are connected to the D8125INV.
• If the voltage is fluctuating between
3 VDC and 12 VDC, there is a
problem with the data wiring
between the control panel and the
D8125INV. Fix the faulty wiring.
Refer to
Figure 28 on page 54.
• If the voltage is not fluctuating
between 3 VDC and 12 VDC, there
is a problem with the control panel.
Remove and replace the control
panel.
Remove and replace the control panel.
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Bring a programmed wireless transmitter to the
FA400 Receiver. Activate the transmitter.
On the FA400, does the VALID DECODE
LED flash when the transmitter is activated?
Remove and replace the FA400
Receiver.
Remove and replace the D8125INV.
Fix the faulty wiring between the D8125INV and the
FA400 Receiver. Refer to Figure 28 on page 54.
Program the wireless transmitter.
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