D9068
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Operation and Installation Guide | Appendix A: Troubleshooting
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Bosch Security Systems, Inc. | 3/13 | F01U071094-0
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Appendix A:
Troubleshooting
Do not use this section as an acceptance
testing procedure. This information is
provided as a general guide to help you
determine, recognize, and resolve a
system problem during installation,
maintenance, and normal standby.
A.1 On-Board LEDs
The D9068 has four on-board LEDs to
indicate various system conditions.
Refer to
Figure 1
on page 10.
Line 1 LED:
This LED blinks when a
report is sent on Line 1. When a line
fault condition occurs on Line 1, this
LED lights steadily in conjunction with
the Sys Trouble LED. If the Line 1 LED
lights steadily:
1.
Use a voltmeter to measure the
voltage present across each telephone
line (Tip to Ring), while the
telephone line is idle.
The voltage present while there
is an incoming call can be more
than 100 VAC.
Ensure that the standby telco battery
voltage is between 30 VDC and 50 VDC.
The D9068 accepts any voltage over 6
VDC.
The voltage polarity is not
important.
2.
Check for other devices that use the
telephone line, such as fax machines,
credit card verifiers, or PBX
systems.
NFPA 72 requires a dedicated
telephone line for fire reporting. If
the devices sharing the telephone
line cannot be removed, ensure that
they are wired so that the D9068’s
line seizure relay disconnects them
when necessary. Measure the line
voltage while these devices are in
use, to verify that it remains above
6 V.
3.
Check for intermittent faults on the
phone line.
Make a test call to verify that the
line is free of distortion and noise.
Temporarily swap Lines 1 and 2 on the
D9068 to check if the problem
indication moves to the D9068’s other
telephone line channel. If the
problem indication moves, the
telephone line is causing the problem
rather than the line monitor.
Ensure that the fault message is
PHONE FAULT and not COMM FAULT. Set
report steering for all events to
Phone 1 Only if only one telephone
number is available for reporting.
COMM FAULT can also occur if one of
the telephone lines has telco battery
voltage, but does not complete a
call. Make test calls to the
receiver(s) on both telephone lines,
listening for the receiver ACK tone.
4.
Verify that two phone lines are
available.
NFPA 72 requires that the Auto Test
Report is sent on a different
telephone line each time it is sent.
If only one telephone line is
connected to the D9068, a COMM FAULT
is generated on every other test
call.
Line 2 LED:
This LED blinks when a
report is sent on Line 2. When a line
fault condition occurs on Line 2, this
LED lights steadily along with the
System Trouble LED. When the Line 2 LED
lights steadily, refer to the preceding
steps for Line 1 LED.
Heartbeat LED:
This LED illuminates and
flashes if the D9068 is functioning
properly. When this LED does not light:
Check the D9068’s main power. Refer
to
on page 4 for information
about settings permitted in UL864
installations.
Verify that the power connections do
not have wire faults.
Refer to
on page
for additional power requirements.
Sys Trouble LED:
This LED is off when
the D9068 operates properly, and lights
steadily for D9068 system trouble. It
also operates with the D9068’s on-board
trouble relay. The number of times the
Sys Trouble LED flashes determines the
trouble condition indicated. Refer to
