The Samsung CM1519 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.
Power frequency error (50/60Hz). Power frequency is other than 50 Hz.
Thermistor open error. The thermistor sensor, which is supposed to sense the temperature of the cavity inside, does not work properly (open).
Thermistor short error. The thermistor sensor, which is supposed to sense the temperature of the cavity inside, does not work properly (short).
HVT-II power error. The circuitry inside the oven is not working correctly.
Temperature of exhaust air too high error. The oven cavity gets too hot due to excessive operation with no load or small load, or due to some blocking materials around the air filter or air exhaust at the back of the oven.
HVT-I power error. The circuitry inside the oven is not working correctly.