CDA PC870 Installation, Use And Maintenance Manual page 22

• The appliance may make what seem to be peculiar noises, even
when the compressor is not running. Details of the sorts of noise
you may hear are below:
Cracking noise, similar to ice cracking - Normal noise that can occur
when the appliance is cooling or warming. Due to the expansion and
contraction of appliance materials.
Loud click - Normal noise and is usually the thermostat switching the
compressor on or off.
Ticking sound - Normal noise that is usually caused by the functions
of a valve at the back of the refrigerator.
Motor sound - Normal noise caused by the compressor running,
sometimes accompanied by a brief metallic rattle. This sound may be
more intense for the first seconds after the compressor starts. If the
metallic noise (i.e. metal hitting metal) is constant then it may be that a
compressor mount is loose. Contact the Customer Care Department
in this instance.
Bubbling noise - Normal noise caused by the movement of the
refrigerant within the appliance's pipework.
Gentle whir and/or 'mooing' noise - Normal noise caused by the
internal fan(s) of the appliance and circulating air.
Fault codes and symbols
In the event of a failure of one or more parts of the appliance, an out-
of-limit temperature measurement or a power issue, the appliance will
display one of five codes and/or symbols on the control panel. These
codes and/or symbols and their probable causes are listed on the
following page.
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