LG Electronics LRTN19310, LRTN22310 service manual Items Unit Standards Purposes Remarks

Page 15

▼General Control of Refrigerating Cycle

NO.

ITEMS

UNIT

STANDARDS

PURPOSES

REMARKS

 

 

 

 

 

 

 

1

Pipe and

Min.

Pipe: within 1 hour.

To protect

The opening time should be reduced

 

piping system

 

Comp: within 10 minutes.

moisture

to a half of the standards during rain

 

opening time

 

Drier: within 20 minutes.

penetration.

and rainy seasons (the penetration of

 

 

 

 

 

 

water into the pipe is dangerous).

 

 

 

 

 

 

 

2

Welding

Nitrogen

Weld under Nitrogen

To protect oxide

- Refer to repair note in each part.

 

 

 

pressure

atmosphere.

scale formation.

- R-134a refrigerant is more

 

 

 

 

(N2 pressure:

 

susceptible to leaks than R-12 and

 

 

 

 

0.1~0.2 kg/cm2)

 

requires more care during welding.

 

 

 

 

 

 

- Do not apply force to pipes before and

 

 

 

 

 

 

after welding to protect pipe from cracking.

 

 

 

 

 

 

 

3

N2 sealed

Confirm

Confirm the sound of

To protect

- In case of evaporator parts, if it doesn't

 

parts

 

N2 leak

pressure relief when

moisture

make sound when removing rubber

 

 

 

 

removing the rubber cap.

penetration.

cap, blow dry air or N2 gas for more

 

 

 

 

Sound: usable

 

than 1 min. and than use the parts.

 

 

 

 

No sound: not usable

 

 

 

 

 

 

 

 

 

4

Refrige-

Evacuation

Min.

More than 40 minutes

To remove moisture.

 

 

ration

time

 

 

 

 

 

Cycle

Vacuum

Torr

Below 0.03 (ref)

 

Note: Only applicable to the model

 

 

 

 

 

degree

 

 

 

equipped with reverse flow

 

 

 

 

 

 

protect plate.

 

 

Vacuum

EA

High and low pressure sides

 

Vacuum efficiency can be improved

 

 

 

 

are evacuated at the same

 

by operating compressor during

 

 

 

 

time for models above 200 l.

 

evacuation.

 

 

Vacuum

EA

Use R-134a manifold

To protect mixing

The rubber pipes for R-12 refrigerant

 

 

piping

 

exclusively.

of mineral and

will be melted when they are used for

 

 

 

 

 

ester oils.

R-134a refrigerant (causes of leak.)

 

 

Pipe

EA

Use R-134a manifold

To protect R-12

 

 

 

coupler

 

exclusively.

refrigerant mixing.

 

 

 

Outlet

 

R-134a manifold exclusively.

To protect R-12

 

 

 

(Socket)

 

 

refrigerant mixing.

 

 

 

Plug

 

R-134a manifold exclusively.

To protect R-12

 

 

 

 

 

 

refrigerant mixing.

 

 

 

 

 

 

 

 

5

Refrigerant

EA

Use R-134a exclusively.

Do not mix with

- Do not weigh the refrigerant at too

 

weighing

 

Weighing allowance: ±5g

R-12 refrigerant.

hot or too cold an area.

 

 

 

 

Note: Winter: -5g

 

(77°F [25°C] is adequate.)

 

 

 

 

Summer: +5g

 

- Make Copper charging canister

 

 

 

 

 

 

(Device filling refrigerant)

 

 

 

 

 

 

Socket: 2SV Plug: 2PV R-134a

 

 

 

 

 

 

Note: Do not burn O-ring (bushing)

 

 

 

 

 

 

during welding.

 

 

 

 

 

 

 

6

Drier

 

 

- Use R-134a exclusively for

To remove the

 

 

replacement

 

R-134a refrigerator.

moisture from

 

 

 

 

 

- Replace drier whenever repairing

pipe inside.

 

 

 

 

 

refrigerator cycle piping.

 

 

7

Leak check

 

- Do not use soapy water for

Defect in

- Check for an oil leak at the refrigerant

 

 

 

 

check. It may be sucked

refrigerant leak

leak area. Use an electronic leak

 

 

 

 

into the pipe by a vacuum.

area.

detector if an oil leak is not found.

 

 

 

 

 

 

- The electronic leak detector is very

 

 

 

 

 

 

sensitive to halogen gas in the air. It

 

 

 

 

 

 

also can detect R-141b in urethane.

 

 

 

 

 

 

Practice many times before using this

 

 

 

 

 

 

type of detector to avoid false readings.

 

 

 

 

 

 

 

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Contents Refrigerator Safety Precautions ContentsSpecifications Items SpecificationsRef. No Cuft / 22Cuft Rack Parts IdentificationIce Bin Freezer ShelfFreezer Door DisassemblyDoor Switch DoorControl BOX-REFRIGERATOR Defrost Control AssemblyFAN and FAN Motor LampAdjustment CompressorPTC-STARTER Role of the OLP OLP Overload ProtectorTo Remove the Cover PTC Definition of OLPGood Model Circuit DiagramCompressor and Electric Components TroubleshootingPTC and OLP Poor cooling performance Other Electric ComponentsNot cooling at all Compressor doesnt run Check for open short or CauseComplaint Points to be Checked Remedy Service Diagnosis ChartCause State Temperature Remarks Unit Evaporator CompressorTroubleshooting Chart Refrigerating CycleGeneral Control of Refrigerating Cycle Items Unit Standards Purposes RemarksHeater OFF FunctionFreezer FAN DefrostDefect Signs Contents Remarks Mode Manipulation Contents Remarks PCB Function Power CircuitLoad Drive Condition Check Load / Buzzer Drive & Open Door Detection CircuitOpen Door Circuit Door Monitor Circuit Temperature Sensor Circuit + 30 ˚C 86 F Resistance Specification of SensorComplaint Symptom Possible Causes Solution Main PWB Assembly Case Parts Exploded View & Replacement Parts ListFreezer Parts Refrigerator Parts On some models Door PartsNo JL8015A

LRTN19310, LRTN22310 specifications

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In conclusion, the LG LRTN22310 and LRTN19310 refrigerators not only meet the diverse demands of today’s households but also reflect LG’s dedication to quality and innovation in home appliances. Their blend of efficiency, style, and advanced features supports the modern lifestyle, ensuring food is kept fresh while minimizing energy consumption.
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