Board Thread:Questions and Answers/@comment-72.94.45.242-20140612001500/@comment-24860474-20140613105900

Okay first of all, this can happen if the output slot isn't clear. That is, if the intended output and what is actually in the output slot don't match, or if there is a full stack in the output slot, the macerator will stop until the output slot is cleared. You may want to look at your output removal system.

You can also turn off IC2 machine sounds entirely, if you like, by changing the setting in the config.

Sorry I couldn't be more help here.