LG GCS165SVB User manual

Brand: LG

Model: GCS165SVB

Type: User manual

LG GCS165SVB is a chest freezer with a capacity of 165 liters, ideal for storing frozen food in bulk. It features a direct cooling system, which ensures even cooling throughout the freezer. The freezer also includes a heater defrost system, which helps to prevent frost and ice buildup, making it easy to maintain. Additionally, the freezer comes with a lock and key system, providing extra security for your stored items.

CHEST FREEZER

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ

THE "SAFETY PRECAUTIONS" IN THIS MANUAL.

COLOR: PCM-Super WhiteMODEL: GCS165SV

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CONTENTS

-2-

SAFETY PRECAUTIONS

(Page)

SAFETY PRECAUTIONS ............................................................................................................................................................. 2

SERVICING PRECAUTIONS ....................................................................................................................................................... 3

SPECIFICATIONS .......................................................................................................................................................................... 4

DISASSEMBLY ................................................................................................................................................................................ 6

DOOR .............................................................................................................................................................................................. 6

HANDLE ........................................................................................................................................................................................ 6

THERMOSTAT................................................................................................................................................................................ 6

ADJUSTMENT ............................................................................................................................................................................ 7

CIRCUIT DIAGRAM ..................................................................................................................................................................... 8

TROUBLESHOOTING ................................................................................................................................................................... 9

COMPRESSOR AND ELECTRIC COMPONENTS ............................................................................................. ............................................................................................. . 10

PTC .............................................................................................. ................................................................................................... 11

OTHER ELECTRIC COMPONENTS ........................................................................................................................................... 12

EXPLODED VIEW .... . .................................................................................................................................................................. 13

8. Do not open the sealed refrigeration system. It could

9. Curatorial, combustible, explosive, corrosive and volatile

goods cannot be stored in the chest freezer.

11. Chemic reagent is not allowed when washing the chest

freezer. Pls clean it both inside and outside with soft cloth

in litmusless soap water or abluent.

10. Turn off the power and open the door, take the goods to

make defrosting when frost thickness is more than 5mm.

Acuate or hard tools are not allowed to make defrosting.

cause injury or pollute the air. Leave this job to an

autherized servicer with the appropriate refrigerant

recovery equipment.

Please read the following before servicing your

refrigerator.

1. Check if electric leakage occurs in the set.

2. When servicing current applying parts, unplug prior to

servicing.

3. If testing with power on, wear rubber gloves to prevent

electric shock.

4. Be sure to check regular current, voltage, and capacity.

5. Don't touch metal products in a cold freezer compartment

with wet hands. It may cause frostbite or other injury.

6. Prevent water flowing to electric elements in mechanical

parts.

7. When tilting the set, remove any materials on the set,

especially thin plate type (ex,: glass plates or books.)

AIR RECHARGING IN COMPRESSOR

Test the refrigeration system by connecting it electrically before

beginning the refilling operation. This is necessary to ascertain

the function of the motor-compressor and identify defects

immediately. If defects have been found, empty the old system

of R134a residue by breaking off the end of the extension piece

at its narrow point.

(Figure 1) Use the appropriate refrigerant recovery equipment.

Replace the filter and any damaged components. Unsolder and

pull off the piece remaining inside the service tube and then

attach an extension with male Hansen, and last, solder it to the

same tube again. (Figure 2)

POINT TO BE

BROKEN

CHARGE TUBE

EXTENSION

FEMALE

HANSEN

MALE

HANSEN

SOLDERING

POINT

SERVICE TUBE

EXTENSION

Figure 1 Figure 2

SERVICING PRECAUTIONS

-3-

If case that a considerable leakage occurs, it will be necessary

to stop the vacuum pump and add a small quantity of Freon to

the system, if vacuum should not be obtained (pressure gauge

doesn't fall to 1 atmosphere.) Start the refrigeration unit and

find the leakage with a special leak-finder. When the defective

soldering point is visible, repair it after opening the extension

tube valve and reestablishing the normal outside pressure

inside the system.

Because the melted solder is sucked into the tubes and blocks

them, the pressure must be rebalanced when vacuum is in the

system for soldering. As soon as the vacuum operation is over,

add the quantity (in grams) of R134a to the refrigeration

system. Remember that every system has an exact quantity of

R134a with a tolerance of ±5 grams than can be added.

(Figure 5)

TO THE

R-134a CYLINDER

TO THE

REFRIGERATION

SYSTEM

FILLING OR

CHARGE TUBE

VALVE TO BE

OPENED WHEN

REFILLING

TO THE

REFRIGERATION

SYSTEM

TO THE

CHARGE

CYLINDER

VALVE TO BE

CLOSED

AFTER VACUUM

TO THE

VACUUM

PUMP

TO THE

VACUUM

PUMP

PRESSURE

GAUGE

Before performing this operation (if the vacuum pump and

refilling cylinder are connected), make sure that the valve

placed between the vacuum pump and refilling tube are closed

to keep the Freon from adding to the system.(Figure 6)

In addition, check the graduated scale on the cylinder for the

quantity of R134a to be added; for example, if we have 750

grams of Freon in the cylinder and must add 165 grams to the

group, this amount will be reached when R134a has dropped to

585 grams, remembering that the indicator shows a lower limit

of meniscus. Do this after choosing the scale corresponding to

the gas pressure different scales reported as the same gas

pressure indicated by the pressure gauge on the top of the

column.

To make R134a flow into the system, open the valve placed at

the base of the cylinder and connected to the filling tube. The

amount of Freon cannot be added to the system all at once

because it may cause a blocking of motor-compressor.

Therefore, proceed by adding original quantity of about 20-30

grams and close the valve

immediately thereafter.

The pressure rises and the motor-compressor must start,

sucking the gas and making the pressure go down again.

Regulate the valve again, maintaining the same manner until

reaching the quantity of R134a established for the system being

charged. When the system is running, the suction pressure

must be stabilized from 0.10 to 0.4 atmosphere.

It is necessary to execute the soldering operation with valve

open so that the fumes caused by oil residue can come out

freely without blowholes between two tubes during heating the

point to be soldered.

The extension fitted with the male Hansen is connected to the

female fitting of the vacuum pump tube. (Figure 3) Air

evacuating from the system begins as soon as the pump starts.

The refrigeration system must be kept under vacuum until the

reading on the low-pressure gauge indicates vacuum (0

absolute, -1 atm., -760 mm hg.) In any case, it is advisable to

keep the pump running for about 60 minutes. (Figure 4)

Figure 3

Figure 4

Figure 5

-4-

Φ0.8

molecular siever

Door

Leg Adjust

Lock

Machine room

Decor, cover

Thermistor

ITEMS SPECIFICATIONS

DIMENSIONS (mm)

NET WEIGHT (kg)

COOLING SYSTEM Direct Cooling

TEMPERATURE CONTROL

Knob Dial

DEFROSTING SYSTEM

Heater Defrost

Heat preservation

Cyclopentane

REFRIGERANT

R134a(90 g)

ITEMS SPECIFICATIONS

Capillary

Drier

1 EA

LOCK ASSEMBLY

1 EA

Manual owners (1EA)

Card, warranty (1EA)

Key (2EA)

Cover Glass

Manual,assembly owners (1EA)

COMPRESSOR PTC Starting Type

EVAPORATOR Fin Tube Type

CONDENSER

Ref. No: GCS165SV

SPECIFIC A TIONS

-5-

DISASSEMBLY

I. Instruction for removal of the temperature control component

II. Instruction for removal of the hinge components

1. Removal of the upper housing of the hinge: slightly

move the upper housing of the hinge outwards, and lift

upwards to remove.

2. Removal of the lower housing of the hinge: slightly

move the lower housing of the hinge outwards, and

push downwards to remove.

3. Removal of the hinge: screw off the screws for fixing

the hinge with the pneumatic screw driver to remove

the hinge from the case.

1. Removal of the temperature control component:

hold the fixture on the upper part of the temperature

control panel to push the temperature control

component outwards the case from the compressor

cabinet; hold and lift upwards the top of the

temperature control panel to remove the temperature

control component from the case after pushing.

2. Removal of the temperature control knob:

pull the temperature control knob from the

temperature controller directly.

3. Removal of the temperature controller:

Remove the screw which is used to fix the case controller

and controller panel , separate these 2 parts. Loose and

remove the temperature controller fix nut with Φ15mm sleeve,

4. Removal of the indicator lamp:push aside the clamped hook a little ,

pull the indicator lamp outwards and remove it

-6-

ADJUSTMENT

1. COMPRESSOR

1) Role

The compressor intakes low temperature and low

pressure gas evaporated from Evaporator of the

Refrigerator, and condenses this gas to high temperature

and high pressure gas, and then plays delivering role to

Condenser.

2) Composition

The Compressor is Composed of Compressor Apparatus

compressing gas, Compressor Motor moving Compressor

Apparatus and Case protecting Compressor Apparatus

and Motor. There are PTC-Starter, and Over Load

Protector (OLP) in the Compressor outside. On the other

hand, because the Compressor consists of 1/1000mm

processing precision components and is sealed after

production in absence of dust or humidity, deal and repair

with care.

3) Note for Usage

(1) Be careful not to allow over-voltage and over current.

(2) No Strike

If applying forcible power or strike (dropping or

careless dealing), poor operation and noise may occur

(3) Use proper electric components appropriate to the

Compressor.

(4) Note to Keep Compressor.

If Compressor gets wet in the rain and rust in the pin of

Hermetic Terminal, the result may be poor operation

and poor contact may cause.

(5) Be careful that dust, humidity, and flux welding don't

inflow in the Compressor inside in replacing the

Compressor. Dust, humidity, and flux due to welding

which inflows to Cylinder may cause lockage and

noise.

2. PTC-STARTER

1) Composition of PTC-Starter

(1) PTC (Positive Temperature Coefficient) is a no-contact

semiconductor starting device which uses ceramic

material and this material consists of BaTiO3.

(2) The higher the temperature is, the higher becomes the

resistance value. These features are used as starting

device for the Motor.

2) Role of PTC-Starter

(1) PTC is attached to Hermetic Compressor used for

Refrigerator, Show Case and starts Motor.

(2) Compressor for household refrigerator applies to

single-phase induction Motor.

For normal operation of the single-phase induction motor, in

the starting operation flows in both main coil and sub-coil.

After the starting is over, the current in subcoil is cut off. The

proper features of PTC play all the above roles. So, PTC is

used as a motor starting device.

3) PTC-Applied Circuit Diagram

According to Starting Method for the Motor

4) Motor Restarting and PTC Cooling

(1) For restarting after power off during normal

Compressor Motor operation, plug the power cord

after 5 min. for pressure balance of Refrigerating Cycle

and PTC cooling.

(2) During normal operation of the Compressor Motor,

PTC elements generate heat continuously. Therefore,

if PTC isn't cooled for a while after the power has been

shut off, Motor can't operate again.

5) Relation of PTC-Starter and OLP

(1)

If the power is off during operation of Compressor and the

power is on before the PTC is cooled, (instant shut- off within

2 min. or reconnect a power plug due to misconnecting), the

PTC isn't cooled and a resistance value grows. As a result,

current can't flow to the sub- coil and the Motor can't operate

and the OLP operates by flowing over current in only in the

main-coil.

(2)

While the OLP repeats on and off operation about 3-5 times,

PTC is cooled and Compressor Motor performs normal

operation.

If OLP doesn't operate when PTC is not cooled,

Compressor Motor is worn away and causes circuitshort and

fire. Therefore, use a properly fixed OLP without fail.

6) Note to Use PTC-Starter

(1) Be careful not to allow over-voltage and over-current.

(2) No Strike

Don't apply a forcible power or strike.

(3) Keep apart from any liquid.

If liquid such as oil or water away enter the PTC,

PTC materials it may break due to insulation

breakdown of the material itself.

(4) Don't change PTC at your convenience.

Don't disassemble PTC and mold. If the exterior to the

PTC-starter is damaged, resistance value is altered

and it may cause poor starting of the compressor

motor may cause.

(5) Use a properly fixed PTC.

Figure 19

GN/YL

Optional

P.T.CSTARTER Compressor

OVERLOAD

PROTECTOR

-7-

3. OLP (OVER LOAD PROTECTOR)

1) Definition of OLP

(1) OLP (OVER LOAD PROTECTOR) is attached to the

Hermetic Compressor and protects the Motor by

cutting off current in Compressor Motor in case of

over-rising temperature by Bimetal in the OLP.

(2) When over-voltage flows to Compressor motor, the

Bimetal works by heating the heater inside the OLP,

and the OLP protects Motor by cutting off current

which flows to the Compressor Motor.

2) Role of the OLP

(1) The OLP is attached to the Hermetic Compressor

used for the Refrigerator and Show Case and prevents

the Motor Coil from being started in the Compressor.

(2) Do not turn the Adjust Screw of the OLP in any way for

normal operation of the OLP.(Composition and

connection Diagram of OLP)

CONTACTING

POINT

COVER

BIMETAL

CONTACTING

POINT

HEATER

TERMINALS

ADJUST

SCREW

HEATER

BIMETAL

Figure 20

CIRCUIT DIAGRAM

BN:BROWN BL:BLUE RD:RED BK:BLACK GN/YL:GREEN&YELLOW

GN/YL

Optional

P.T.CSTARTER Compressor

L H

THERMOSTAT

Power pilot lamp

Fan

Compressor

pilot lamp

OVERLOAD

PROTECTOR

POWER SUPER CORD

THE PLUG TYPE ON CIRCUIT DIAGRAM IS SUBJECT TO

CHANGE IN DIFFRENT LOCALITIES.

-8 -

TROUBLESHOOTING (Mechanical Part)

1. COMPRESSOR AND ELECTRIC COMPONENTS

YES

Power

Source.

Remove the Relay Assy

from the Compressor

and measure the voltage

between Terminal C of

Compressor and

Terminals M or S of

Relay Assy

No Voltage.

(Rating Voltage

±10%)

Replace

Relay Assy

Replace

Relay Assy

O.K.

Advise the customer

to use a regular

Trans.

Replace Compressor.

OLP works within

30 sec. in forcible

OLP operation by

turning instant power

on and off.

Components start in

the voltage of Rating

Voltage ±

Applied voltage isn't

in the range of Rating

Voltage

Check the resistance

among M-C, S-C and

M-S in Motor

Compressor.

Check the resistance of

two terminals in PTC-

Starter.

Check if applying

a regular OLP.

Measure minimum

starting voltage after 5

min. for balancing cycle

pressure and cooling the

PTC.

Check the

resistance of

Motor

Compressor.

Check the

resistance of

PTC-Starter.

Check OLP.

Check

starting state.

10% below

-9-

2. RELAY ASSY (PTC AND OLP)

L N

3 2

YES

Normal operation of

Compressor is

impossible or poor.

Separate the Relay Assy

from Compressor and

measure the resistance

between M and S with a

Tester or Whistone Bridge.

(Figure 21)

Separate the Relay Assy

from the Compressor and

check the resistance value

between two terminals of

OLP with a Tester.

Observation value is

220V/50Hz : 22

Ω±

30%

115V/60Hz : 6.8

Ω±

30%

240V/50Hz : 33

Ω±

30%

127, 220V/60Hz :

Ω±

30%

The resistance value is 0

or serveral hundreds Ω.

The value is ∞.

Check another

electric components.

Replace Relay Assy.

Check another

electric

components.

Replace

Relay Assy.

22 erugiF12 erugiF

-10 -

3. ANOTHER ELECTRIC COMPONENTS

Cooling is impossible

Cooling ability is poor

Compressor

doesn't run.

Running state of

Compressor is poor.

Check a starting

voltage.

Check if current flows to

the following

components.

a. Thermistor

b. Starting devices

c. OLP

d. Compressor coil

e. Circuit Parts

Low voltage.

Poor contacting.

Shorted or broken.

Poor contacting

or shorted.

Coil shorted.

Poor contacting

or shorted.

Poor contacting

and broken.

Shorted.

Lack of capacity.

Coil of motor

Compressor.

Replace

the compressor.

Replace

each component.

Raise the voltage.

Replace

each component.

Cause.

Check if current flows

to starting devices.

Check current flowing

in sub-coil of

Compressor.

Check capacity of OLP.

The items described

above are normal.

Much frost are sticked

to the EVAPORATOR.

Shorted.

Replace

the Heater, Sheath

Replace

each component.

Check current flowing

of the following

components.

• THERMISTOR

• FUSE, MELTING

Check current flowing

of the following

components.

• HEATER, SHEATH

Fan motor

doesn't run.

Poor contacting.

Coil is shorted.

Replace

each component.

Check current flowing

in SWITCH, DOOR.

Check current flowing in the

MOTOR[MECH], FAN.

TROUBLE SHOOTING

-11-

Fault phenomenon Possible cause for faults Inspection scope Removal Notes:

No input

voltage

existing

Poor contact between the plug

and the socket

Inspect whether the plug and the

socket are loose

Repair or replace the socket Call an electrician

for repair

White indicator

lamp not

operating

Poor contact with the white

indicator lamp

Inspect whether the connector

assembly is loose

Insert the connector assembly

tightly

Input voltage

existing

White indicator lamp damaged Remove the white indicator lamp Replace

Poor contact between the pink

indicator lamp and the plug

foot

Inspect whether the connector

assembly is loose

Insert the connector assembly

tightly

opening

pink indicator lamp damaged Remove the pink indicator lamp Replace

Call professional

for repair

No put the temperature

controller to operating state

position

Inspect the temperature controller Put to the operating state position

as per consideration for use

Pink indicator

lamp not

operating

Poor contact with the

temperature controller

Inspect whether the connector

assembly is damaged

Insert the connector assembly

tightly

Compressor set

not opening

Temperature controller

damaged

Inspect whether open circuit

exists in two connector

assemblies

Replace the temperature controller

Too mush frosting on

evaporator

Inspect whether thickness is more

than 2mm

Remove the frost timely

Over-high frequency of

opening the door

Reduce the frequency of opening

the door as much as possible

Too mush articles in the case Inspect whether it is possible to

impact the circulation of cool air.

Take some food out

Over-temperat

ure in the case

Refrigerating fluid leaking Repair in a maintenance point

machine set

operating

continuously

Over-high ambient

temperature and too low

temperature of the temperature

controller

Inspect whether the knob is put

on Positions “2-4” or forced

cooling

Adjust the knob to Positions

“2-4”

Temperature in

the case

reached

Temperature controller fault Replace the temperature controller

Case no keep flat Inspect whether four castor

wheels touch ground

Cushion timely

Retaining screws of the compressor loosening Inspect whether the screws are

screwed down.

Screw the screws down

Call professional

for repair

Pipelines contacting Separate the pipeline

Starting relay and thermal protection

connector assembly loosening

Inspect whether the connector

assembly is damaged

Insert the connector assembly

tightly

Compressor damaged Repair or replace the compressor

Call professional

for repair

Excessive noise,

red and green

indicator lamps

operating, and

compressor not

operating

Voltage less than 187V Inspect supply voltage Connect a voltage stabilizer over

1000V

If the supply cords are damaged, in order to avoid danger, replacement of the supply cords must be carried out by the manufacturer or its maintenance

department

Note: the following phenomenon is not the fault phenomenon

1. Slight gurgle exists in the temperature-changeable freezing refrigerator occasionally;

2 The compressor and the condenser emit heat, even scald hands;

3 It is possible to generate water bubbles outside the refrigerating cabinet when the ambient temperature is higher.

4 The heat of 50 Celsius degree exists outside the temperature outside.

or similar full-time staff, and it is not allowed to replace without authorization.

EXPLODED VIEW

200A

200B

205B

205A

315A

314A

208B

310B

315B

207A

207B

207C

207D

212A

213A

213B

213C

214A

307A

306B

309A

310A

308A

300A

306D

300B

303A

216A

216B

201A

201B

301B

303D

311C

LG GCS165SVB User manual

LG GCS165SVB User manual

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