Zones Problems, Trouble Zone | Bosch Appliances D2071A instruction

D2071A Operations & Installation Guide 6.0 Troubleshooting

6.5Zones Problems

Table 12: Zone Problems

Zone 1 Alarm Initiating Circuit

Symptom	Solution

Does not go into		Maintain a short between Loop ”A”
alarm.		(Terminals 6 and 7) and Loop “B”
		(Terminals 8 and 9) for at least the
		(Terminals 8 and 9) for at least the
		time programmed in Retard Time.
Does not	The circuit must remain normal for at
immediately restore	least the time programmed in Reset
after an alarm.	Time.
Remains in trouble		An open or ground on the circuit
or alarm with all		causes a Trouble Report.
devices connected		• Remove the circuit loops from the
to the circuit		D2071A and meter them for
normal.		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		• Confirm the circuit is wired for the
or alarm with all		mode you selected in the
devices connected		Class “B” Mode.
to the circuit		• Copy the program from the
normal.		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.

6.6Trouble 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.

6.6.112 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.

6.6.224 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.

2 6	Bosch 09/04 74-06200-000-F

D2071A specifications

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