Less than one minute with a Google search gets me to the repair manual for your machine. The beeping is an alarm. The fault should be shown by the LEDs on the front panel.
See the manual here (download a copy and save to your favorite online backup service. Google Drive is good, especially if you already use Gmail
http://www.manualslib.com/manual/783573/Fisher-And-Paykel-Ad55.html#manual
Anon
June 2016