173_58300000002379_ara_en_j.doc – 29.04.14
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2.7
Bottlenecks in the circuit (partial blockage)
The capillary tube is the narrowest point in the refrigeration circuit.
A blockage caused by contaminants or a partial blockage is most
likely to occur in the capillary tube. The cross-section is narrowed by
refrigeration circuit contaminants which become deposited in the
capillary tube inlet. A bottle neck occurs which is similar to an injection
point. The narrowing may cause some of the refrigerant to be
released and evaporate. As a result, this bottleneck cools down. The
cooling process is transferred to the dryer and can therefore be
identified. In an extreme case even condensation may occur.
In principle, a bottleneck can occur on any soldered joint, e.g. even on
the solenoid valve.
2.8
Humidity
2.8.1
Increased humidity
Causes:
►
Door seal leaking.
►
Drainage channel or drainage hole for the condensation is
blocked.
►
Long door opening times.
►
Large quantities of moist food are stored unwrapped in the
appliance.
►
Low ambient temperatures reduce the running time of the
compressor. In this case the humidity does not precipitate on
the evaporator but on the glass plates or on the food. (coldest
point)
►
Bubbles (foaming fault caused by trapped air) in the partition
between the refrigerator and freezer sections.
►
Door is not straight. (Curve)
►
Front strip not completely sealed. Remedial action: Place
packing under door bearing washer.
►
Seal not inserted all the way into the inner door.
►
Uneven front strip.
►
Large gap between side panel and front strip.
Remedial action (if there is no technical defect):
►
Wipe rear panel with a detergent solution. As a result, the
water will be conveyed more quickly to the outside
(evaporation pan on the compressor).
►
Advise customer, e.g. pack produce, avoid opening the door
for long periods, etc.
