AFCI's have known conflicts with some types of equipment, and maybe the technology has not caught up with the micro reffer combo. What i do know is that certain types of speed controled motors, and LCD or Plasma TV's and monitors will trip them. It's due to a change in the waveform. The AFCI recongnizes this as an Arch Fault. Seeing that the reffer may be cap start, and the micro is just loaded with them, the circuit may just be doomed to be a nuissiance. So, why do you have AF's in the Kitchen? Is that a 2005 NEC thing?
"Well - I oughta....." -Jackie Gleason