I have a Eliwell ID974 controller in a used Samoa 120 gelato case. It didn't come with a manual and once or twice a day it goes into defrost mode and jumps from -17C to 8C and completely ruins my ice cream product in the case. Does anyone know where I can find a manual or can anyone tell me how to simply turn off the defrost setting so that it doesn't defrost on it's own? Thanks.