9
Noises and alarms
9.1
Operating noise
The compressor and the cooling circuit make various noises while the appli-
ance is running. Although the appliance is fitted with a quiet compressor and a
noise-optimized cooling circuit, certain noises cannot be completely avoided
and their volume depends on how it is installed and on the cooling require-
ments (e.g. fast cooling). Operating noise is most audible immediately after
the compressor cuts in.
Keyword
Cause
Remarks
Buzzing
Cooling aggregate
Normal operating noise of the cooling ag-
gregate; level depends on the size of the
appliance.
Gurgling,
bubbling,
hissing
Cooling circuit
Normal operating noise as refrigerant
flows through the cooling circuit.
Humming
Fan
Normal operating noise of forced air cool-
ing.
Humming
Air flap
Operating noise of the air flap.
Hissing
Cooling circuit
Normal operating noise as refrigerant is in-
jected into the evaporator.
Clinking
Load, etc.
Arrange the bottles so that they do not
touch.
Creaking
Housing
Normal, temperature-dependent stress-
strain of the materials, e.g. plastics, insula-
tion.
Cracking
Housing
Ice cracking as it defrosts.
Unusual noises caused by improper installation
Unusual noises are often caused by improper installation. The appliance must
be installed on a level and stable surface. The pipework on the back of the ap-
pliance must never touch the wall or other furniture. The pipes must not touch
each other.
In open kitchens or in the case of appliances installed in partitioned areas,
normal operating noises may seem louder. This is not a fault but rather an ef-
fect of the architecture.
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