D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
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Bosch Security Systems, Inc. | 11/05 | F01U011024B 57
TTP16: Point Trouble on One of the Eight
On-board Points
Initial Actions
• Refer to
TTP32 Silencing Alarms or Troubles, and
Clearing Keypad Memory
on page 70 to silence
alarms or troubles, clear keypad memory, and
view the points that are in alarm or trouble.
• If using an Ademco UL Bell, ensure that the S3
switch is open, and that a 220 kΩ end-of-line
(EOL) resistor is installed (Point 8 only).
• If not using an Ademco UL Bell, ensure that the
S3 switch is closed, and that a 1 kΩ EOL resistor
is installed (Point 8 only).
Procedure
1. Select an on-board point that is in trouble.
2. Using a keypad, view Point Assignments for the point
you are troubleshooting and determine which point
index the point is using.
3. View that point index, and determine the Type and
Point Response (for more information, refer to
Table 32).
Is the point programmed to respond as desired?
Fix the programming problem.
Set your digital voltmeter (DVM) to measure VDC. Connect
the red DVM lead to the + side of the point. For the affected
point, connect the black DVM lead to the common side of
the point.
Does the DVM read <2.0 VDC or > 3.0 VDC?
Check the voltage on all remaining on-board zones.
Do all voltages measure between 0 VDC and 5
VDC?
A B C
A B C
• If any voltage measures >8 VDC, remove
the wires that are connected to that point.
View point status again for the on-board
point that was in trouble. If it shows
anything other than NORMAL, replace the
control panel.
• If the point status shows NORMAL, refer
to
TTP50 Unexpected Voltage on On-
board Point Wiring on page 108 to
locate the source of the >8 VDC.
Replace the control panel.
Remove all wires from the point. Set your DVM to measure
resistance. Connect the red DVM lead to one conductor
and the black DVM lead to the other conductor.
Does it read <900 Ω or >1.1 kΩ?
Connect a 1 kΩ resistor to the point. Repeat the
voltage check.
Does the DVM still read <2.0 VDC or > 3.0 VDC?
With the affected point’s wires still
disconnected from the control panel, perform a
VDC and VAC voltage check on the wires
leading to the point.
• If the voltage = 0 VAC and 0 VDC, refer
to
TTP49 Wire Shorted to Ground on
page
106.
• If the voltage is not 0 VAC and 0 VDC,
refer to
TTP50 Unexpected Voltage on
On-board Point Wiring on page 108.
Replace the control panel.
• If the resistance was <900 Ω, refer to TTP46 Shorted
Wiring on page 98.
• If the resistance was >1.1 kΩ, refer to
TTP47 Open
Wiring
on page 100.
Table 32: Point Type and Point Response Selections
Point Type Selections
Point Response
Selections
1
0 1 2 3 4 5 6 7 8 9 A B C D E F
0 24-Hour 6 O/C Point
Open I I I I D D I I D I I I I I T
1 Perimeter 7 D279 (O/C Non-Priority)
Armed
2
Short I I I I I I D D D I I I I I I
2 Interior 8 D279 (O/C Priority) Open T T T I I T I T
3 Interior Follower 9 Easikey
Disarmed
2
Short T T T I T I I
4 Keyswitch Maintained Open I T I T I T S T S S
5 Keyswitch Momentary
24-Hour
3
Short I I T T I T T S S S
Not
Applicable
1
Selections: D = Delayed Response, I = Instant Alarm, S = Supervisory,
T = Trouble, Blank = No Response
2
For point types 1 through 3 only.
3
For point type 0 only.
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