Fisher and Paykel 402b beeping issue.

Hello, we have the above fridge freezer which is emitting a beeping noise which can be rest by pressing the button which changes the temperature selection for fridge or freezer. I have seen that this question has been posted before but our problem seems subtly different. The green light to show which compartment has been selected flashes for both fridge and freezer along with the temperature bars. I have seen a lot of posts describing this and stating that their is either frost in the freezer compartment or that the fridge is no longer cold. We have no frost (although the beeping has only recently started so may need to build up over time?) and our fridge is still being cooled.

Thanks for taking the time to look at this and any thoughts greatly received, apologies if this has been answered before I have checked but nothing posted seems to be the same as our problem.