FM 60 goes into snooze mode constantly

What can cause an FM 60 to constantly go to snooze mode during the middle of the day when the batteries are not charged yet. I just got this email from a freind that is having this problem. Here is a copy and paste:

I still have problems getting the batteries fully charged.In the morning before sunrise they are usually between 24.5 and 24.8.At sunset between 25.2-25.4. According to the link I have a draw of about 80 watts during the night.
The panels are charging great, up to 33 amps in the middle of the day. If they would do that constantly, the batteries could be full in the early afternoon. However, the charge controller Flexmax 60 won't let them, going into the snoozing mode every few minutes. Not so much in the early morning hours and later in the afternoon. It does it when the panels are really starting to charge; then it snoozes more often than not. And when fridge and freezer box are running while the charger is snoozing, most or even more of what has been gained during the morning hours will disappear and the minus on the link goes up again.
I run the generator almost every morning until the minus on the link goes down to 50 or less, hoping the charger will let enough solar through so the link shows a positive in the afternoon and the batteries will absorb and float. They did that every afternoon before I got the fridge without help of the generator.Unfortunately it does not happen very often now.

Not sure what to suggest to her to check on the 60, any suggestions?
Larry