Keypad/ Door Station Problems
Keypad Beeps continuously
If a Keypad is beeping continuously, it means that it has not received any RS485
communications on the KA/KB lines for the last 6 seconds. The beeps will continue until
any key is pressed or if communication resumes. The beeping does not occur if the unit can
receive communications but is not addressed by the Control panel, due to settings in
Locations 1674 and 1675.
1
Check that the KA/KB are connected to KA/KB on the Comfort panel.
2
Check that the U5 IC (LTC1487) on the Comfort PCB close to the KA/KB terminal block
is installed, and in the right orientation.
3
If
all
Keypads and Door Stations beep continuously, it means that the problem lies on
the Comfort panel. Check that the U5 IC s inserted in the socket, and there is voltage
12V to 14V on the 12V terminal. Check the state of the RED (D1) and Green (D2) leds
and refer to the section above on Startup problems.
Keypad keys do not beep when pressed
If the keypad keys do not give a beep tone when pressed, but there is no continuous
beeping tone as described above, the keypad is receiving communications from the control
panel, but its id is not being polled. If there are 10 keys pressed without a poll of that id,
further key presses will not produce beeps.
1
Check that the Keypad/ Door Station selection (JP5) is correctly set to 1-2 (upper
position) for Keypad, and 2-3 (lower position) for Door Station.
2
Check that the ID selection switch SW1 is set to the correct id according to the ID
selection table in Chapter 2.
3
Check that the Number of Keypads (Location 1675) and Number of Door Stations
(Location 1674) are correctly set to the number of keypads and Door Stations
respectively. The Comfort system must always be reset after changing these
parameters.
4
Check that the KA and KB connections are not reversed.
Pressing any key gives a long beep
This means that another keypad is being used, intercom or menu mode. Pressing F will end
use of the other keypad, ("thank you, Goodbye").
Cannot Sign in on Keypad
1
Check that the MIC and Voice are connected to JP15 on the Control Panel. If voice is
not heard, the problem is in the Audio path.
2
Check that the COMFIGURATOR interface is not still connected.
3
Check that the Keypad/Door Station ID (SW1) and Keypad/ Door Station selection
(JP5) is correctly set for each Keypad and Door Station.
4
Check that the Volume Control knob on the Keypad (or the internal trimmer in the
Door Station) is not all the way down.
5
Check that all other Keypads are not in use, for example in Security Check which does
not time out. Press F on the active Keypad to exit.
None of the Indicator LEDs on the Keypad are on
At least one LED should always be on steady or blinking.
1
Check that the 12V and Ground are connected to the corresponding terminals on the
Comfort panel, and the wires are not reversed.
2
Use a multimeter to check that 12V is actually coming to the Keypad
Playback of Recording from the Keypad is Distorted
Usually, this is because the KPMIC Microphone trimmer is set to too high a gain. Reduce the
gain by tuning the KPMIC trimmer lower (clockwise) on the Control panel. This trimmer is
fixed at the factory from July 2008.
Comfort II Supplementary Installation Manual
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