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Bosch | 09/04 | 74-06200-000-F26
D2071A | Operations & Installation Guide |
6.5 Zones Problems 6.6 Trouble Zone 9
A TROUBLE ZN 9 Report tells you there is a problem
with the battery when the D2071A is in 12 VAC Mode.
It also indicates there is a problem with the power
supply in the 24 VDC Mode.
6.6.1 12 VAC Mode (Battery and Transformer)
When a TROUBLE ZN 9 Report occurs in 12 VAC
Mode:
1. Confirm there is at least 12 VAC on Terminals 1
and 2.
2. Ensure the outlet the transformer is plugged into
meters between 110 VAC and 120 VAC.
3. Confirm the output for the transformer connected to
Terminals 1 and 2 is rated for 12 VAC and at least
20 VA.
4. Disconnect the transformer from Terminals 1 and 2
and meter the battery at Terminals 3 and 4. A fully
charged battery should show 13.8 V.
5. Ensure the battery is a 12 V sealed, lead-acid type. It
should be rated at 2.3 Ah or 7 Ah or greater,
depending on the NFPA classification of the
installation.
6.6.2 24 VDC Mode (Connection to FACP)
When a TROUBLE ZN 9 Report occurs in 24 VDC
Mode:
1. Confirm Terminals 1 and 2 have 27.6 VDC.
2. Ensure the earth ground is not connected to
Terminal 3.
3. Confirm Terminals 4 and 5 are not connected to a
battery.
4. Confirm program item 12 V Mode is set to NO.
6.0 Troubleshooting
Zone 1 Alarm Initiating Circuit
Symptom Solution
Does not go into
alarm.
Maintain a short between Loop ”A”
(Terminals 6 and 7) and Loop “B”
(Terminals 8 and 9) for at least the
time programmed in Retard Time.
Does not
immediately restore
after an alarm.
The circuit must remain normal for at
least the time programmed in Reset
Time.
Remains in trouble
or alarm with all
devices connected
to the circuit
normal.
An open or ground on the circuit
causes a Trouble Report.
• Remove the circuit loops from the
D2071A and meter them for
continuity. There should be no
more than 100 Ω resistance
between the wires that connect to
Terminals 6 and 7 and between
the wires that connect to
Terminals 8 and 9.
• With the wires for the circuit
loops still removed from the
D2071A, meter them for
continuity to ground.
Zone 2 or 3 Supervisory Circuit
Symptom Solution
Remains in trouble
or alarm with all
devices connected
to the circuit
normal.
• Confirm the circuit is wired for the
mode you selected in the
Class “B” Mode.
• Copy the program from the
D2071A to confirm the Class “B”
Mode is correctly programmed.
An open on the circuits causes a
Trouble Report for Modes 2 and 3,
and an Alarm Report for Mode 1. A
ground can cause an Alarm Report
for Modes 2 and 3.
• Remove the circuit loops from the
D2071A and meter them for
continuity. There should be no
more than 100 Ω plus the value of
the resistors in the circuit
between the wires that connect to
Terminals 10 and 11, or between
the wires that connect to
Terminals 11 and 12.
• With the wires for the circuit
loops still removed from the
D2071A, meter them for
continuity to ground.
Table 12: Zone Problems