Resetting power to the Guardian Ultra Converter is often one of the first steps in troubleshooting keypad communication issues where all keypads are affected. With both wired and wireless keypads, resetting the Guardian Ultra Converter allows the device to reboot and reconnect with the PC and the keypads.
First, you will need to power off the Guardian Ultra Converter. If you can locate the power supply in the wall, unplug it. If you are not able to locate the power supply you can also disconnect the power terminal block.
Once you have unplugged power, the PC Com light will still be lit, unplug the USB cable. Once all lights on the ultra converter have turned off, plug everything back in. Give the system about 3 minutes to check itself and then check for communication or look for updated gate activity in the gate activity window.