Diagnosis
Yes, that's normal operational noise for this model. It's the sound of refrigerant flowing through the coils.
How to Fix It
No fix needed—it's designed to do this. The sound is most noticeable during the compressor's startup cycle and when the unit switches between compressor runs in a damp environment. You can't silence it.
If That Didn't Work
If the sound changes to a loud knocking, banging, or screeching, that's not normal. A knocking could indicate a loose compressor mount. Screeching suggests a fan motor bearing failing. In those cases, unplug the unit and contact support.
Heads Up
Place the unit on a perfectly level, hard floor. On an uneven or soft surface (like thick carpet), the compressor vibration amplifies all operational noises, making the gurgling sound louder.