LG Gr P227 Ytqa Service Manual

TROUBLE DIAGNOSIS
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Problems Symptom Causes Checks Measures Remarks
Defective Buzzer rings  Trouble mode indication. Check trouble diagnosis function. Repair troubles Refer to mode 
display button. but key doesindication in
not sense evenfunction 
button is explanations.
pressed.
Door Buzzer Buzzer  Defective connecting lead wire from  Check lead wire associated with door Repair lead wire. Check model
continuously main PCB to door switch. switch. with dispenser.
rings or door Defective freezer...

3. Cooling Cycle Heavy Repair
3-1. The Heavy Repair Standards for Refrigerator with  R134a Refrigerant  
NOTE)Please contact Songso company on +82-53-554-2067 if you have inquiry on heavy repair special facility.
TROUBLE DIAGNOSIS
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NO. Items Unit Standards Purposes Remarks
1 Pipe and piping  Min. Pipe:within 1 hour. To protect The opening time should be reduced to a 
system opening time. Comp:within  Moisture half of the standards during rain and 
10 minutes. Penetration. rainy seasons (the...

3-2.  Summary Of Heavy Repair 
TROUBLE DIAGNOSIS
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Process Contents Tools
- Cut charging pipe ends and discharge refrigerant from  Filter, side cutters
drier and compressor.
- Use R134a oil and refrigerant for compressor and drier Pipe Cutter, Gas welder, N
2gas
- Confirm N
2sealing and packing conditions before use.
Use good one for welding and assembly.
- Weld under nitrogen gas atmosphere.(N
2gas pressure:
0.1-0.2kg/cm
2).
- Repair in a clean and dry place.
- Evacuate for more than forty minutes...

3-3. Precautions During Heavy Repair
TROUBLE DIAGNOSIS
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Items Precautions
1. Use of tools. 1) Use special parts and tools for R134a.
2. Removal of retained  1) Remove retained refrigerant more than 5 minutes after turning off a refrigerator. 
refrigerant. (If not, oil will leak inside.) 
2) Remove retained refrigerant by cutting first high pressure side (drier part) with a nipper and
then cut  low pressure side. (If the order is not observed, oil  leak will happen.)
3. Replacement of drier. 1) Be...

3-4. Practical Work For Heavy Repair
TROUBLE DIAGNOSIS
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Items Precautions
1. Removal of residual 
refrigerant.
1) Remove residual refrigerant more than 5 minutes later after turning off the refrigerator. 
( If not, compressor oil may leak inside.)  
2) Remove retained refrigerant slowly by cutting first high pressure side (drier part) with a
nipper and then cut  low pressure side.
2. Nitrogen blowing 
welding.
When replacing a drier:
Weld and parts by blowing nitrogen(0.1~0.2kg/cm
2) to high...

TROUBLE DIAGNOSIS
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Items Precautions
4.Vacuum degassing.
Pipe Connection
Connect a red hose to the high pressure side and a blue hose to the 
low pressure side. 
Vacuum Sequence
Open , valves and evacuate for 40 minutes. Close valve . 
5.Refrigerant charging.
Charging sequence
1) Check the amount of refrigerant supplied to each model after completing vacuum 
degassing. 
2) Evacuate bombe with a vacuum pump.
3) Measure the amount of refrigerant charged.
- Measure the weight of an evacuated bombe...

3-5. Standard Regulations For Heavy Repair
TROUBLE DIAGNOSIS
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Items Precautions
4) Refrigerant Charging
Charge refrigerant while operating a compressor as shown above.
5) Pinch a charging pipe with a pinch-off plier after completion of charging. 
6) Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test
on the welded parts. 
6. Gas-leakage test * Take a leakage test on the welded or suspicious area with an electronic leakage tester.
7. Pipe arrangement  Check each...

3-6. Brazing Reference Drawings
PIPE ASSEMBLY JOINT
PIPE ASSEMBLY
HOT LINE
(Refrigerator)PIPE ASSEMBLY
HOT LINE
(Freezer)
PIPE ASSEMBLY
JOINT
CONDENSER ASSEMBLY  WIRE
PIPE ASSEMBLY SUCTIONDRIER ASSEMBLY CAPI - TUBE
Copper BrazerCopper(Silver)
Brazer
Silver Brazer
Copper
Brazer
Copper Brazer
Copper Brazer
Coppper BrazerSilver Brazer
Silver
Brazer
PIPE ASSEMBLY JOINT
PIPE ASSEMBLY HOT LINE
(Freezer)
PIPE ASSEMBLY
JOINT
CONDENSER ASSEMBLY  WIRE
PIPE ASSEMBLY SUCTIONDRIER ASSEMBLY CAPI - TUBE
Copper...

4. HOW TO DEAL WITH CLAIMS
4-1. Sound
TROUBLE DIAGNOSIS
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Problems Checks and Measures
Whizz soundsExplain 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...

TROUBLE DIAGNOSIS
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Problems Checks and Measures
Sounds of water flowingExplain 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 soundsExplain the characteriistics of moving parts.
• This noise comes from the MICOM controllers switch on the top of the
refrigerator when it is turned on and off.
Noise of ice maker operationExplain the procedure and...