when its pluged into electrical outlet, it trips off the electric fuse/breaker. what is the cause of this?

Hi. The first thing I would do is plug the unit into a different outlet on a different circuit. Make sure it is not any type of GFI outlet or breaker. See if the unit trips the new outlet / breaker. I almost always find when a GFI or breaker is being tripped that the issue is not the unit but in the circuit. You could have a short in the refrigerator if the breaker still trips. Turn the t-stat off to the unit and plug back in. See if it trips now. You will what to narrow down to what system or circuit in the unit that’s shorted or causing the breaker to trip. You can start disconnecting components and plugging the unit back it until you get it narrowed down. Sorry, there is no tech available at this time from the manufacture. You should find one in the machine, most likely under the right door hinge or the toe panel.