Issue
What keypads will work on the D6112?
Solution
Compatible keypads are:
D420A, 6 zone LED. This will work but only the first six zones will be displayed.
D620, 8 zone LED.
D626, 16 zone LED.
D630, 8 zone LED with 3 onboard expansion points.
D636A, 16 zone alpha display with 3 onboard expansion points
Issue
D7112 Panel battery will not hold a charge.
Solution
A slow flashing (1 sec on, 1 sec off) yellow LED with the green CPU LED off indicates a power supply overload condition. The panel detects the battery as missing and the power supply cannot meet the power demand of the devices on the panel. The panel is shut down.
Issue
How do I tell if my wiring is good and all the devices are connected on the D6112 keypad bus?
Solution
Remove the data wires from terminals 11 and 13 on the control panel. Also remove the power going to those devices. Using a multimeter set to read resistance, place one lead on a data wire and the other lead on the other data wire.
The correct resistance reading should be 9K Ohms per device connected.
Number of device / Device Resistance / Wire / Max resistance
1 9 k ohms 15 k ohms 23 k ohms
2 18 k ohms 15 k ohms 32 k ohms
3 27 k ohms 15 k ohms 41 k ohms
4 36 k ohms 15 k ohms 50 k ohms
How to correct custom functions that execute when A, B or C keys are pressed on the D720.
D1256 Command Center functions are Executing when A, B or C Keys on a D720 are pressed.
How to correct when the Independent Zone Controller point never restores to normal.
The panel point that uses a D279 or D279A never shows normal even though the Independent Zone Controller points are all normal.
D279A,D279
How to troubleshoot the panel only operating from Battery but not AC when a D928 is connected.
The panel is working but Command Centers read Service AC Fail. The A/C input voltage to the panel is correct but when the battery is removed the panel shuts down.
