Caution - very loud Blubbergeräusche!

I got delivered the unit about a month ago. Build quality is acceptable; on the side parts one recognizes a plurality of symmetrically distributed pressure points inward, which probably at the side cover is screwed to the backbone. For the price, but you can not complain about it, but should be expected with such trifles. The protective film was very difficult to remove, especially in some corners and some of it is still visible in tight corners at closer inspection. Functionally I can not say anything negative - the operating temperatures of refrigerators and freezer were achieved fairly quickly and the compressor runs fairly quiet.

Shortly after the first time, however, a very disturbing, relatively loud, rugged bubbling from the rear wall fell on her. A measurement in about 1m distance showed 52dBA instead of the promised 42dBA. Since there is no built-in unit, but individually is in the room, you can hear the bubbling very clear throughout the apartment, even with closed kitchen door.
As it is still clearly audible throughout the day not disappeared after about 14 days, I called customer service. This also clearly heard the sound of the phone and said that this would actually disappear after 14 days are. He advised me to disconnect the device from the power and 1-2h to take another 14 days once in operation. After nothing changed here again, I agreed after Council of customer service a short-term on-site appointment, which was realized in just a few working days. The technician listened to the sound, and it certainly classified as a normal operating noise which is inevitable by evaporating coolant. There would only devices that are due to design soundproof better or modulate sounds less annoying by mechanical arrangements. In the end I have now, nor an invoice for EUR 98 because of this customer service application without technical defect - to pay in addition. Thank Haier - in addition to this annoyance I'll probably have a lot of fun with the noise ...