LG Electronics GR-P227/L227, GR-P257/L257 guide

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 -

Image 24

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

Contents

Refrigerator Contents Page Specifications Front View Ref No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Parts Identification Freezer Refrigerator compartment compartment Ref No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification HOW to Install Refrigerator How to Adjust Door Height of Refrigerator How 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 Type When customer uses bottled water Filter CleaningOutternal Filter Filter Fixation After installing water filter Replacement of water filter How to Control the Amount of Water Supplied to Icemaker Confirm the amount of water supplied to the icemaker Door Alarm Buzzer Mute Mode Display Power saving ModeMicom Function Monitor Panel Exhibition Mode Description of Function Outside temperature display function LCD Back Light ControlLock function display button lock Filter condition display function When ice maker does not operate smoothly Dispenser use selectionAutomatic ice maker Express Freezer Super 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 bar Sequential operation of built-in product Failure Diagnosis Function Mode Operation Contents Remarks Test Function Test Mode 1 Status LCD Test Mode 2 Status LCD Function of dispenser and water dispenser built-in Power circuit Explation for Micom CircuitExplanation for PWB circuit GR-P227/L227 Reset circuit Oscillation circuitGR-P227/L227/P257/L257 Load/dispenser operation, door opening circuit Load Driving Circuit Lever Switch sensing circuit Measuring part Dispenser operation circuit Door opening sensing circuit Temperature sensing circuit Short Open Switch 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 Table Stage Items Indicator Remarks Defect diagnosis function Circuit Trouble Shooting Trouble Diagnosis Not 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 Measures Temperature 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 Micom Driving circuits Motor damper Replace door switch Trouble Diagnosis Cooling Cycle Heavy Repair Items Unit Standards Purposes Remarks Process Contents Tools Summary Of Heavy Repair Precautions During Heavy Repair Items Precautions When replacing a drier When replacing a compressorPractical Work For Heavy Repair Inserting a capillary tube Pipe Connection Vacuum SequenceCharging sequence Calculation of amount of refrigerant charged Standard Regulations For Heavy Repair 12-0mm Brazing 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 sounds Explain 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 dispenser Measures 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 formation Others HOW to Disassemble and Assemble Remove a freezer door Handle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Ref No. GR-P227/GR-P257 Optional part Ref No. GR-L227/GR-L257 Freezer Compartment Refrigerator Compartment Optional part Machine Compartment ICE & Water Part Dispenser Part No JD8999A