The symbol you've emphasized on is alerting the filter to be cleared. The water dispenser gets clogged with impurities and gets fucked. Just clear the filter and that's it.

Get it near ventilated area link near window, it is buzzing due to it is getting warm in faster rate than it probably should be. And about this sign I have no idea............ But I can tell you for certain, you can find every answer about your Refrigerator in its manual.

Download the manual for that specific fridge on google and there u have it Thank me later🗿