Fault Possible cause Troubleshooting
Circle stains on glass shelves
Stains visible as soon as condensate forms
Stains appears in new acquired appliances
glass shelves and spare parts glass shelves
Stains fade out in room temperature
Stains cannot be cleaned
Stains are the imprints of silicone suction cups that are
used during processing and handling of glass shelves
in the factory
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Advise customer:
There is no technical or material defect. Stains exists due to produc-
tion and part handling process in the factory. With a loaded glass
shelf or "normal" air humidity the imprints are not visible. Imprints will
disappear even after several months of use.
Refrigeration circuit pipe is pressed This is not a fault
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Refrigeration circuit pipe pressed the way visible on the graphic in
"Fault" section is the technical solution for low pass filter. It reduces
pulsation from the refrigerant on the pressure side.
Fault Diagnosis
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