... Defrost function Commerical Yogurt Ferment Machine1. Plug in, the machine is ready in refrigeration condition, press emergency switch, point ... , the buzzer alarm, press emergency stop again, the machine returns back to refrigeration condition. Press the function for 3 ... temperature is 5 Celsius degree. After 4 hours continuous refrigeration, the machine will defrost for 10 minutes, after that, return ...