F1 - Ambient temperature sensor has recorded a temperature higher than 85 deg C. The ambient temperature is the temperature of the air outside the oven in the wall cavity. This is cooled by the cooling fan on top of the oven. Check that fan is working (Can you feel cold air blowing out of vent above the door?) If fan is working & cavity in wall has not been altered recently then the sensor on the main controller may be faulty & giving a false reading. That would mean replacing the PCB controller.
Lincoln Appliance NZ, July 2009