I have one of these machines with a problem.
It cools fine, and appears to be working fine. When left overnight the compressor stops, and the freezer temp display starts flashing. At this point if I put it into self diagnosis mode, no LED segments are illuminated i.e. no problem (?). The cabinet temp goes way off of setpoint.
If I put it in to Mode display (wrong name, but hold quick freeze / vacation and then press fridge temp when display flashes) it shows it being in fridge defrost and low temperature operation.
What does the flashing freezer temp indicate.
What is Low Temperature operation.
Not had a chance to get in to the machine yet to check sensor values, but could this be as simple as the fridge getting stuck in defrost / faulty defrost sensor?