LG Electronics GR-P227/L227, GR-P257/L257 service manual Sequential operation of built-in product

Page 24

MICOM FUNCTION

2-15. Sequential operation of built-in product

Built-in products such as compressor, frost removal heater, freezing room fan, Cooling Fan and step motor damper are sequentially operated as follows for preventing noise and part damage occurred due to simultaneous operation of a lot of parts in applying initial power and completing test.

 

Function

 

 

 

 

 

 

 

 

 

Load Operation Sequence

 

 

 

 

 

 

 

Remark

 

When temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIRACLE

 

 

 

 

If error occurs

 

of a frost removal

 

 

 

 

 

 

 

 

 

 

F-FAN

 

R-STEP

 

 

 

 

 

HOME

during operation,

 

sensor becomes

POWER

0.3

 

COMP

 

0.3

0.3

0.3

 

ZONE

 

0.3

 

initial operation is

 

 

 

 

&

MOTOR

 

STEP

 

 

BAR

 

more than 45°C

 

 

sec.

 

 

 

 

sec.

 

sec.

sec.

 

 

sec.

 

not done.

 

 

ON

 

 

 

ON

 

 

 

 

C-FAN

DAMPER

 

DAMPER

 

 

 

HEATER

 

(In purchase,

 

 

 

 

 

 

 

 

 

ON

 

ON

 

 

 

MOTOR

 

 

 

ON

 

 

movement)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

In

When

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

applying

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

■ Sequence of

temperature of a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DAMPER

 

 

DAMPER

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

POWER

0.3

 

FROST

6

 

 

FROST

0.3

HOME

5

HOME

 

0.3

5

 

load operation

 

frost removal

sec.

 

sec.

 

sec.

sec.

sec.

&

 

sec.

 

&

when closing

 

sensor becomes

 

 

 

REMOVAL

 

 

REMOVAL

 

BAR

 

BAR

 

DUCT DOOR

 

DUCT DOOR

Initial

 

 

 

 

HEATER

 

 

HEATER

HEATER

HEATER

 

 

F-room and

less than 45°C

ON

 

 

 

 

 

 

HEATER

 

 

HEATER

 

 

 

ON

 

 

 

OFF

 

ON

 

OFF

 

 

 

 

R-room.

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

OFF

 

(In power failure,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

service)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.3

PIPE

 

5

 

PIPE

 

0.3

 

 

0.3

F-FAN

0.3

 

R-STEP

 

0.3

MIRACLE 0.3

 

HOME

 

 

 

sec.

&

sec.

&

 

sec.

COMP sec.

sec.

 

 

sec.

ZONE

sec.

 

 

 

 

DISP'

 

 

 

DISP'

 

 

 

 

 

 

&

 

 

MOTOR

 

 

STEP

 

 

BAR

 

 

 

 

HEATER

 

 

HEATER

 

 

 

ON

 

C-FAN

 

DAMPER

 

DAMPER

 

HEATER

 

 

 

 

 

 

 

 

 

 

ON

 

 

ON

 

 

MOTOR

 

ON

 

 

 

 

ON

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON

 

 

 

 

 

Test mode 1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MIRACLE

If pressing switch

 

(Compulsory

TEST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

once more in the

 

 

 

 

OTHER

 

0.3

COMP

0.3

F-FAN

0.3

 

R-STEP

 

0.3

 

ZONE

 

function)

 

S/W

 

 

 

LOAD

 

sec.

sec.

&

 

sec.

 

MOTOR

 

sec.

 

STEP

test mode 2 or

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(PRESS

 

 

 

 

 

 

 

 

 

ON

 

C-FAN

 

 

DAMPER

 

 

 

DAMPER

temperature of a

TEST

 

Once)

 

 

 

OFF

 

 

 

 

 

 

ON

 

 

 

ON

 

 

 

MOTOR

frost removal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CLOSE

sensor is more

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MODE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

than 5°C, it

Test mode 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

immediately

(Compulsory frost

 

TEST

 

 

 

COMP

 

0.3

F-FAN

0.3

FROST

 

0.3

 

R-STEP

returns to the test

 

 

 

 

 

 

 

 

mode for initial

 

removal)

 

 

 

 

 

sec.

sec.

 

sec.

 

 

 

S/W

 

 

 

 

 

 

 

 

&

REMOVAL

 

MOTOR

operation

 

 

(PRESS

 

 

 

 

OFF

 

 

 

 

C-FAN

 

 

HEATER

 

 

 

DAMPER

 

 

2 Times)

 

 

 

 

 

 

 

 

OFF

 

 

 

 

ON

 

 

 

 

CLOSE

(COMP operates

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

after 7 minutes).

- 22 -

Page 23 Page 25
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Page 23 Page 25
Contents Refrigerator Contents Page Specifications Front ViewRef No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Parts Identification Freezer Refrigerator compartment compartmentRef No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification HOW to Install Refrigerator How to Adjust Door Height of RefrigeratorHow to Install Water Pipe Before InstallationClass Shape and Spec Nomenclature Connection of Pipe Connector a and B Single Lever Type Faucet generalTwo Hands Type Faucet General TypeWhen customer uses bottled water Filter CleaningOutternal Filter Filter Fixation After installing water filter Replacement of water filterHow to Control the Amount of Water Supplied to Icemaker Confirm the amount of water supplied to the icemakerDoor Alarm Buzzer Mute Mode Display Power saving ModeMicom Function Monitor PanelExhibition Mode Description of FunctionOutside temperature display function LCD Back Light ControlLock function display button lock Filter condition display functionWhen ice maker does not operate smoothly Dispenser use selectionAutomatic ice maker Express FreezerSuper freezing Miracle Zone functionControl of variable type of freezing room fan Door opening alarm Control of M/C room fan motorDoors of freezing Or home barSequential operation of built-in product Failure Diagnosis Function Mode Operation Contents Remarks Test FunctionTest Mode 1 Status LCD Test Mode 2 Status LCD Function of dispenser and water dispenser built-inPower circuit Explation for Micom CircuitExplanation for PWB circuit GR-P227/L227Reset circuit Oscillation circuitGR-P227/L227/P257/L257 Load/dispenser operation, door opening circuit Load Driving CircuitLever Switch sensing circuit Measuring part Dispenser operation circuitDoor opening sensing circuit Temperature sensing circuit Short OpenSwitch entry circuit Option designation circuit model separation functionSeparation Connection Status Application Standard Stepping motor operation circuit Fan motor driving circuit freezer, mechanical area +5 C +9F 33 k Ω 56 k Ω JCR1 Main PCB Sensor resistance characteristics table Miracle Zone Stepping Motor / Display Operation Principle Harvest Mode Icemaking ModeFill/Park Position Water supply amount TableStage Items Indicator Remarks Defect diagnosis functionCircuit Trouble Shooting Trouble DiagnosisNot performed Evaporator by heating as Refrigeration Refrigeration Residual Refrigeration No cooling air circulation Is weak Fan does not work Recess Sounds Compressor compartment operating sounds Bad soldering Bad rivet contact Short Structure Door foam Appearance Sag Faults PowerProblems Causes Checks Measures Remarks Problems Causes Checks MeasuresTemperature Cooling Disconnected from the motor Refer to fan motor disassembly Problems Causes Defrosting failureMeasures Remarks Remove the parts and replace it Icing Discharging port of cooling air Sound Click Contraction of evaporator Sources Sound Burping It happens when refrigerant expands Odor Problems Symptom Causes Checks Measures Remarks MicomDriving circuits Motor damper Replace door switch Trouble Diagnosis Cooling Cycle Heavy Repair Items Unit Standards Purposes RemarksProcess Contents Tools Summary Of Heavy RepairPrecautions During Heavy Repair Items PrecautionsWhen replacing a drier When replacing a compressorPractical Work For Heavy Repair Inserting a capillary tubePipe Connection Vacuum SequenceCharging sequence Calculation of amount of refrigerant chargedStandard Regulations For Heavy Repair 12-0mmBrazing Reference Drawings Asia / Middle-East AfricaEurope & CIS / America Problems Checks and Measures Explain the principles of temperature changeSound depends on the installation location Explain general principles of soundsExplain the procedure and principles of ice maker operation Explain the flow of refrigerantExplain the characteriistics of moving parts Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Check the temperature control button and set at strong Odor and FrostExplain the basic principles of food odor Explain the basic principles of frost formationOthers HOW to Disassemble and Assemble Remove a freezer doorHandle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Ref No. GR-P227/GR-P257 Optional partRef No. GR-L227/GR-L257 Freezer Compartment Refrigerator Compartment Optional partMachine Compartment ICE & Water Part Dispenser Part No JD8999A
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