The Samsung SMH7178STD Oven has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your Samsung might be giving you.
This message appears when the microwave is first plugged in or after a power interruption.
The power interruption may be due to a blown fuse or tripped circuit breaker.
The oven door might not be securely closed, or packing material is stuck to the door seal.
The microwave might not be properly plugged into a grounded outlet or the outlet is not functioning.