User Manual

KTD-405/KTD-405A/KTD-405-2D Controller Keypad
User Manual
54
Troubleshooting your keypad
This section provides information to help you diagnose and solve various problems that may arise while
configuring or using your GE Security product and offers technical support contacts in case you need
assistance. (See Contacting us on page 56.)
Adhere to all installation guidelines while making connections, including those provided in section Chapter 2,
Installation on page 7.
• I can’t control the cameras or DMVRes.
This could be the result of a number of different causes. First, make sure that you are in zone mode while
trying to control cameras through a DVMRe. Also try cycling the power on the DVMRe and keypad to see
if a simple reset will correct the problem.
If that doesn’t solve the problem, check the wiring, verifying the following:
• The correct type of wiring (STP or UTP) is being used for the different signals.
• All wires are in good condition.
• All cabling and pinout connections are made according to directions (observing polarity).
• Equipment is properly terminated.
• Cables are properly grounded.
Lastly, the cause of the problem could be incorrect wiring of dome inputs or incorrect zone addressing
(camera addressing starts at 0 in zone mode). The address of the camera has to be one less than the input on
the DVMRe. Readdress the cameras or move the coaxial connections up one input on the DVMRe.
If none of these solutions corrects the problem, contact customer support.
• I cannot connect to a DVMRe.
Make sure that the correct hub device is selected in the zone programming menus. The slection defaults to
Triplex. Also check the termination and bias settings (see
Installation guidelines on page 8).
• I have lost control between keypads that are connected using RS-422.
The keypad may be positioned incorrectly on the RS-422 control line with a switcher and data merger.
Refer to the keypad, switcher, and data merger installation instructions and correct wiring along RS-422
control line. With the KTD-405 keypad, the units should be in line in the following order: keypad, data
merger, and switcher.
• Audio on KTD-405A keypads is unclear.
You probably have incorrectly set jumpers or a faulty KTD-336. Ensure that the attenuation jumpers are
set as described in Two-way audio on page 47.
If a KTD-336 is present, ensure that its relays are not clicking. If they are, contact customer support.
• I cannot control the dome camera.
You may have poor voltage or resistance on the data line. If the wiring, addressing, and termination of the
camera and keypad are all correct, verify that the voltage along the RS-422 data line reads approximately
1.5 VDC and that it drops when a command is sent. If it isn’t, check the power line. Also verify that the
resistance across the RS-422 data line is between 95 and 125 ohms. If it isn’t, contact customer support.