It is very common for a new appliance to give off an unpleasant smell or emit some smoke the first few times it is used. The phenomenon will stop after you used the appliance a number of times.
Let the appliance cool down
The appliance may give off an unpleasant smell or emit some smoke if it has been used too long or with very hard ingredients. In this case you have to switch the appliance off and let it cool down for 60 minutes.