This Tech Tips video explains what alternating 2 and 3 beep means and how to fix it
Alternating 2 beeps and 3 beeps means there is a power issue, typically caused by retrofitting an older solenoid device with an unfiltered or unregulated power supply. This indicates that the power supply is not providing stable or proper power to the device.
To fix the alternating 2 and 3 beeps, first test the power supply with an alternate power source, such as a Cat Field tester, to ensure it works properly. If the power supply is confirmed to be the issue, you will likely need to replace it with a newer, filtered, and regulated power supply to ensure stable power delivery to the device.