I encountered this exact problem with the ASR-5. Definitely contact Balmar, they know their gear
You should get the data for battery temp and alternator temp. It may require enabling long output mode. In my case we believe that the battery temperature was resulting in zero amps charging. My Beneteau's batteries are located in the engine room and I discovered through this process that my blower has never worked. I didn't know there was one.
The alternator was also scorching hot during this. I found that by disconnecting the battery temperature sensor
that the regulator once again let the charging commence. The output was reduced due to the alternator temperature, but it did continue to deliver amps. I have since fixed the blower but not yet done a complete test to validate. One setting worth changing is how often the regulator checks to see if it needs to change modes. Default should be 18 minutes. The minimum is 6 minutes. Balmar recommended that I change to 6 minutes. They said even at 18 minutes there is no danger
of damaging the batteries.