DOWNLOAD LG GR-P207DTU Service Manual ↓ Size: 8.05 MB | Pages: 127 in PDF or view online for FREE

- 106 -

"Whizz" sounds

■

Explain general principles of sounds.
• All refrigerator when functioning properly have normal operating sound. The

compressor and fan produce sounds.
There is a fan in the freezer compartment which blows cool air to freezer and
refrigerator compartments. "Whizz" 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 3600RPM. The sound of compressor
operation becomes louder as the refrigerator capacity increases.

"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 3600RPM. This sound is caused by the vibration of motor and piston when
they start and finish their operation. This phenomena can be compared with that
of cars. When the car engine ignites and starts to rotate, the loud sound
becomes gradually quiet. When the engine stops, it stops with vibration.

Vibration sound

■

Check the sound whether it comes from the pipes vibration and friction.
• Insert rubber or leave a space between pipes to avoid the noise.
• Fix the fan blade if the noise is due to the collision of fan and 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.

- 107 -

Sounds of water flowing

■

Explain the flow of refrigerant.
• When the refrigerator stops, the water flowing sound happens. 

This sound happens when the liquid or vapor refrigerant flows from the
evaporator to compressor.

"Click" sounds

■

Explain the characteriistics of moving parts.
• This noise comes from the MICOM controller's switch on the top of the

refrigerator when it is turned on and off.

Noise of ice maker operation

■

(applicable to model with ice maker).

• Automatic ice maker repeats the cycle of  water supplying 

➝

icemaking 

➝

ice 

- Noise produced by ice dropping 

ejection.  When water is supplied, the water supply valve in the machine room 

and hitting ice bank.

makes sounds like “Whizz” and water flowing also makes sound. When water 

- Noise from motor sounds “Whizz”.

freezes to ice, freezing sounds such as “click, click” are heard.  When ice is
being ejected, sounds like “Whizz” produced by a motor to rotate an ice tray
and ice dropping and hitting ice bank sounds are also heard.

Noise when  supplying water.

■

Explain the principles of water supplied to dispenser.
• When the water supply button in the dispenser is pressed, the water supply

valve in the compressor compartment opens and let the water flow to the water
tank in the lower part of the refrigerator compartment. The water is dispensed
by this pressure. When this happens, motor sound and water flowing sound are
heard.

Noise when  supplying ice.

■

Explain the principles of ice supply and procedure of crushed ice making in a
dispenser.
• When ice cube button is pressed, ice stored in the ice bank is moved by a Helix

Pusher and dispensed.  If crushed ice button is pressed, the cube ice is
crushed.  When this happens, ice crushing and hitting ice bank sounds are
heard.

- 108 -

Refrigeration is weak.

■

Check temperature set in the temperature control knob.
• Refrigerator is generally delivered with the button set at “normal use” (MID). 

But customer can adjust the temperature set depending on their habit and taste.
If you feel the refrigeration is weak, then set the temperature control button at
“strong” position. If you adjust the button in the freezer compartment as well, 
the refrigeration is stronger than adjusting refrigerator only.

The food in the chilled drawer is .

■

not frozen but defrosted

• Use chilled drawer for storing fresh meat or fish for short periods. For storing for

a long periods or freezing food, use a freezer compartment.  It is normal that
frozen foods thaw above the freezing temperature (in the chilled drawer).

Refrigerator water is not cool.

■

Check the water storage location.
• If water is kept in the door rack, please ask to keep it in the refrigerator

compartment shelf.  It will then become cooler. 

Ice cream softens. 

■

Explain the characteristics of ice cream.
• The freezing point of ice cream is below -15°C. Therefore ice cream may melt if

it is stored in the door rack.

• Store ice cream in a cold place or set the temperature control button of a freezer

at “strong” position.

Refrigeration is too strong.

■

Check the position of temperature control button.
• Check if refrigeration is strong in whole area of the refrigerator or partly near the

outlet of the cooling air. If it is strong in whole area, set the control button at
“weak”. If it is strong only near the outlet of cool air, keep food (particularly wet
and easy to frozen such as bean curd and vegetables) away from the outlet.

Vegetables are frozen.

■

Check the vegetables storage.
• If vegetables are stored in the refrigerator shelf or chilled drawer instead of

vegetable drawer, they will be frozen. Set the control button at “weak” if they are
also frozen in the vegetable drawer.

The food stored at inside of 

■

the shelf freezes even the 

• The temperature at cooling air outlet is always below the freezing point. 

control button is set at “MID”.

Do not store food near the outlet of the cooling air as it block the air circulation.
And do not block the outlet.  If the outlet of the cooling air is blocked, the
refrigerator compartment will not be cooled.

- 109 -

Odor in the refrigerator compartment.

■

Explain the basic principles of food odor.
• Each food has its own peculiar odor. Therefore it is impossible to prevent or

avoid food odor completely when food is stored in the completely sealed
refrigerator compartment. Deodorizer can absorb some portions of the odor but
not completely. The intensity of odor depends on refrigerator conditions and
environments. 

■

Check the temperature control button and set at “strong”.
• Clean inside of the refrigerator with detergent and remove moisture. Dry inside

the refrigerator by opening the door for about 3 or 4 hours and then set the
temperature control button at “strong”.

Frost in the freezer compartment

■

Explain the basic principles of frost formation.
• The main causes for frosting:

- Door was left open.
- Air penetration through the gasket
- Too frequent door opening. (parties. etc.)
- Hot foods are stored before they are cooled down. The temperature of freezer

is -19°C. if temperature is set at “MID”. If hot air comes into the refrigerator,
fine frost forms as cold air mixes with hot air. If this happens quite often, much
frost forms inside of the refrigerator. If the door is left open in Summer, ice may
form inside of the refrigerator.

Frost in ice tray.

■

Explain basic principles of frost formation.
• When ice tray with full of water is put into a freezer compartment, the water

evaporates.  If cool air fan operates, the moisture attached to the jaw (protruded
part) of ice mold shall freeze and form frost. If warm water was put into the ice
mold, the situation will become worse.