... 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 ... medium, strong, and fermentation time is 4, 6, 8 hours, and the machine is ready in fermentation temperature at 42 degree ...