H.Koenig AGE6 Manual De Instrucciones página 6

Older refrigerators may contain CFCs that destroy the ozone
layer; contact your nearest waste treatment center for more
details on proper disposal procedures.
This appliance contains the coolant isobutene(R600a),a
natural gas which is environmentally friendly. Although it is
flammable, it does not damage the ozone layer and does not
increase the greenhouse effect. The use of this coolant has,
however, led to a slight increase in the noise level of the
appliance. You might be able to hear the coolant flowing
around the system.
This is unavoidable, and does not have any adverse effect on
the performance of the appliance. Care must be taken during
the transportation and setting up the appliance that no parts
of the cooling system are damaged. Leaking coolant can
damage the eyes.
A wine cellar is the most practical space for storing wines.
Its role is to balance the temperature and humidity inside so
that your wine does not lose its taste and its aromas.
Due to these heavy operations, noises can be heard. Most
of the time, this is normal noise.
Before calling technical service for assistance, please read
these few lines.
These sounds are completely normal: buzzing, roaring,
clicking, cracking ...
When the cellar has just stopped working, you may hear a
buzzing, roaring, clicking or squealing noise. When the
operation stabilizes, the sounds subside.