SilentKnight 5700 - Manual (Page 158)

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Section 10
Testing and Troubleshooting
10.1 Troubleshooting
This section of the manual offers suggestions for troubleshooting hardware problems. Please read this section if
you encounter a problem when installing the control panel. If these suggestions do not solve your problem or if
you encounter a problem that is not listed here, contact Silent Knight Technical Support for assistance.
10.2 Common Problems
Problem Possible Cause / Suggested Actions
Trouble message “DBL ADDR” (Double
Address) displays on LCD. An address has been assigned to more than one detector. Correct the address
following the procedure described in Section 5.
Auxiliary power or notification circuits
have incorrect polarity. Correct polarity. For notification and auxiliary power circuits: When in alarm or
powered, terminals labeled “X” are positive, terminals labeled “O” are negative.
SLC devices are not being recognized
(trouble message “Missing” displays). Check hardware connections.
If devices are physically connected, make sure wiring is correct (see Section
5.4). For the main panel, the positive side of device must be connected to
terminal 34; the negative side must be connected to Terminal 33. For SLC
devices, make sure the device connects to the SLC loop via the SLC OUT
terminals.
Make sure SLC devices have been addressed properly following the procedure
described in Section 5.
For contact monitor modules, which are addressed using DIP switches, the DIP
switch must be set to the correct address before power is applied to the SLC loop.
If this procedure is not followed, the device will have an incorrect address.
Make sure correct polarity has been observed for SLC device wiring. See Section
5.
SLC devices are not being recognized
(trouble message “Missing” displays on
the annunciator). Check that SLC loop impedance is within the required range.
To measure impedance, use the following procedure.
1. Disconnect both wires from the terminal block at the panel (SLC devices can
remain connected).
2. Measure the impedance from positive to negative and from negative to posi-
tive. Both measurements should be greater than 500 K ohms. If the installa-
tion uses T-taps, test each T-tap individually.
3. Temporarily connect the positive wire to the negative wire of the SLC loop at
the point farthest from the panel (SLC devices can remain connected).
4. Measure the impedance from positive to negative and from negative to posi-
tive. Both measurements must be less than 50 ohms.