LG LRSC21934SW, Service Manual

Page: 110 / 129

TROUBLE DIAGNOSIS
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Problems Checks and Measures
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
■
Explain the procedure and principles 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.