codes to be certain that the unit will operate only on the single code you plan to enter. Follow the steps shown below.
Press the “Prgm Code” button on the CPU board for one second. Confirm fast flashing yellow LED
Enter 0-0 followed by the Bell key (or wait 5 seconds). Confirm two red flashes Enter 8-8 followed by the Bell key (or wait 5 seconds). Confirm two red flashes Extinguish the fast yellow flashing LED by pressing the Bell Key or waiting 30 seconds
This procedure has erased any program code that was present and all User codes. The yellow LED will usually come on steadily. If it doesn’t, it means that the unit has a previous Hard code in memory and this is no problem as you will be overwriting the old Hard code. Return to the beginning of this Section for fixed code programming.
4.2 KEYPAD CHANGEABLE PROGRAMMING
In this application, two codes are programmed into the DK-26. The first, called the Program code acts as a password which allows changing the User code. It is the User code which is employed regularly to gain access. Knowledge of the Program code should be restricted to security management as its only use is to change the User code. With this method of operation, higher security is obtained because the end user can change the User code regularly or any time he feels it has been compromised.
With power applied to the unit, note that the yellow LED is on steadily. This signals that all code memories are empty (you don’t want any unknown codes present). If the yellow LED is not on, read the last two paragraphs in this section for the procedure to erase existing codes.
Once you have confirmed the steady yellow light on the keypad, go to the CPU board and press the button marked “Prgm Code” for about one second (see Figure 2). Returning to the keypad, note the yellow LED flashing rapidly (about three times a second). This indicates “program mode”. Within 30 seconds, enter the prefix 0-0and then your Program code from five to seven digits (you can’t use the bell key but repeating digits is OK). If you wait longer than 30 seconds to start your code entry, the “programming window” will automatically terminate, so press the Prgm Code button again. Do not pause while you’re entering all these digits as any time there is more than a five second gap between keys being pressed, the unit will stop reading the sequence. Note that a successful button press is echoed by a beep and a flash of the green LED. When you have completed entering your Program code, hit the Bell key and you should see the red LED display two pulses within a second. If you don’t hit the Bell key, your code will be accepted anyway but it will take five seconds for the two red flashes to come. If you have selected a seven digit code, the two red flashes will occur immediately as the digit limit has been reached. The two pulses signal that your code has been accepted. If you get a single one second long red pulse, you’ve done something wrong. Pressing fewer than 5 keys, for example, would be would be interpreted as a disallowed Program code.
You’ll note that after the two confirming red flashes are seen, the unit automatically returns to program mode (rapid yellow flash). You could exit program mode by either hitting the Bell key or waiting 30 seconds, but you now want to program your User code. Immediately enter the prefix 0-1and then your user code from two to seven digits. When you see the two confirming red flashes, exit program mode by hitting the Bell key or waiting 30 seconds. If you get the single “error” pulse, note that the unit will automatically return to program mode and you can attempt to re-enter your user code. If you continuously get the error signal, refer to the troubleshooting section which explains all the possible reasons for a code not being accepted.