LG LSC 26945SW, Service Manual

Page: 90 / 107

4. HOW TO DEAL WITH CLAIMS
4-1. Sound
TROUBLE DIAGNOSIS
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Problems Checks and Measures
Hiss sounds
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Explain general principles of sounds.
• All refrigerators make noises when they run.
The compressor and fan produce sounds.
There is a fan in the freezer compartment which blows cool air to freezer and
refrigerator compartments.
Hiss sounds are heard when the air passes through
the narrow holes into the freezer and refrigerator compartments.
■
Cooling Fan sound in the compressor compartment.
• There is a fan on the back of the refrigerator which cools the compressor
compartment. If there is a small space between the refrigerator and the wall, the
air circulation sounds may be noticeable.
■
Noise of Compressor.
• This operating sound happens when the compressor compresses the
refrigerant. The compressor rotates at 3600 RPM. The sound of compressor
Bigger refrigerators make more noise than small ones
Click sounds
■
Explain the principles of temperature change.
• The sounds happens when pipes and internal evaporator in the refrigerator
compartment expand and contract as the temperature changes during the
refrigerator operation. This sound also happens during defrosting, twice a day,
when the ice on the evaporator melts.
Clunk sound
■
Explain that it comes from the compressor when the refrigerator starts.
• When the refrigerator operates, the piston and motor in the compressor rotate
at 3600 RPM. This sound is caused by the vibration of motor and piston when
they start and finish their operation. This phenomenon can be compared with
that of cars. When an automobile engine starts, it is loud at first but quiets
down quickly. When the engine stops, so does the vibration.
Vibration sound
■
Check the sound whether it comes from the pipes vibration and friction.
• Insert bushing or leave a space between pipes to avoid the noise.
• Fix the fan blade if it is hitting on the shroud
• Fix the drip tray if it is loosened.
■
Sound depends on the installation location.
• Sound becomes louder if the refrigerator is installed on a wooden floor or near
a wooden wall. Move it to the another location.
• If the refrigerator is not leveled properly, a small vibration can make a loud
sound. Please adjust the level of the refrigerator.