GE TBQ440ANDR, TBQ470ANDR, TBR427ANDR, TBG470ANDR, TBR463ANDR Technician Service Manual

...

g GE Appliances Service Training

____________________________

TECHNICIAN SERVICE MANUAL

Refrigerator

MODELS:

TBG440ANDR TBQ440ANDR TBR427ANDR TBG470ANDR TBQ470ANDR TBR463ANDR TBG530ANDR TBQ530ANDR TBR527ANDR TBG570ANDR TBQ570ANDR TBR565ANDR

TMG432ANDR TMQ432ANDR TMR432ANDR

PUB NO. : SPWR1020E November 2001 - Revised (3)

IMPORTANT SAFETY NOTICE

The information in this service guide is intended for use by individuals possessing adequate backgrounds of electrical, electronic and mechanical experience. Any attempt to repair a major appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.

WARNING

To avoid personal injury, disconnect power before servicing this product. If electrical power is required for diagnosis or test purposes, disconnect the power immediately after performing the necessary checks.

RECONNECT ALL GROUNDING DEVICES

If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened.

Page 2

THE MANUAL COVERS THE

FOLLOWING MODELS

MODEL # COUNTRY

TBR427ANDR

TBR463ANDR

TBR527ANDR

TBR565ANDR

TMR432ANDR

N/A BANGLADESH

N/A CHINA

TBQ440ANDR

TBQ470ANDR

TBQ530ANDR

TBQ570ANDR

AUSTRALIA

HONG KONG

TMQ432ANDR

N/A INDIA

TMG432ANDR INDONESIA

N/A JAPAN

N/A KOREA

N/A MALAYSIA

N/A PAKISTAN

N/A PHILIPPINES

Page 3

THE MANUAL COVERS THE

FOLLOWING MODELS

MODEL # COUNTRY

TBQ440ANDR

TBQ470ANDR

TBQ530ANDR

TBQ570ANDR

TMQ432ANDR

N/A TAIHITI

N/A TAIWAN

TBG440ANDR

TBG470ANDR

TBG530ANDR

TBG570ANDR

SINGAPORE

THAILAND

TMG432ANDR

TMG432ANDR VIETNAM

Page 4

I. SAFETY PRECAUTIONS

PLEASE READ THE FOLLOWINGS BEFORE SERVICING YOUR REGRIGERATOR.

1. Check if an electric leakage occurs in the set.

2. To prevent electric shock, unplug prior to servicing.

3. In case of testing with power on, wear rubber gloves to prevent electric shock.

4. If you use any appliances, check regular current, voltage and capacity.

5. Dont touch metal products in cold freezer with wet hand. It may cause frostbite.

6. Prevent water flowing to electric elements in mechanical parts.

7. When you stand up during observing the lower part with the upper door open, move with care to prevent head would which may happen by hitting the upper door.

8. When sloping the set, remove any materials on the set, especially thin plate type. (ex.: glass shelf or books.)

9. When servicing evaporator part, wear cotton gloves without fail. It is to prevent wound by sharp fin of evaporator.

10. Leave a breakage of refrigerating cycle to a heavy service center. The gas in cycle inside may soil ambient air.

Page 5

TBR / TBQ / TBG 570 ANDR TBR / TBQ / TBG 530 ANDR TBR / TBQ / TBG 470 ANDR TBR / TBQ / TBG 440 ANDR TMG / TMR / TMQ432 ANDR

Refrigerant R-134a R-134a R-134a R-134a

Capacities (Liter) 560 500 450 410

Capacities (Cu. Feet) 19.8 17.7 15.9 14.5

Fan cooling ****

Exterior

New Round Face & Arc Design ****

Recessed Handle ****

Automatic Defrosting System ****

Interior Lamp

II. SPECIFICATIONS

565 / 570

ANDR

527 / 530

ANDR

463 / 470

ANDR

427 / 440

/ 432

ANDR

Transparent Plastic Shelf ****

Freezer

Twisted Ice Tray ****

Transparent Door Racks ****

Deodorizing Device ****

Multi Air Flow ****

Temperature Controlled Meat Keeper ****

Transparent Shelf with Steel Frame ****

Large Interior Lamp ****

Vegetable Crisper with Moisture Control * *

Refrigerator

Traditional Vegetable Crisper * *

Transparent Door Racks ****

Large Bottle / Beer Storage Rack ****

Egg Storage Bucket ****

Silver Gray ****

Navy Blue * *

Color

Wine Red ****

Net Dimension (mm)

W 754 754 674 674

Packing Dimension (mm)

H 1803 1701 1776 1676

D 690 690 660 660

W 824 824 744 744

H 1881 1779 1844 1744

D 780 780 780 780

Page 6

TBG440ANDR / TBG470ANDR TBQ440ANDR / TBQ470ANDR TBR427ANDR / TBR463ANDR

III. PARTS IDENTIFICATION

Note : Because of ice expansion, containers with water may deform in the freezer.

3.1 FEATURES

Ice Tray : Can make and store 1 kg of ice cube. Temp Controlled Meat Keeper : The fish and meats which will be cooked within 2 days can store here, no

Evaporation Pan : Water discharged from the refrigerator is evaporated here. Door Racks (F) : Short-term storage of frozen food. Egg Storage Basket : Can store 16 eggs Door Racks (R) : Short-term storage of refrigerated food. Bottle Storage Rack : Can store 5 bottles of beer or soda. Regulator : For regulation of the refrigerator.

thawing is required.

Page 7

TBG530ANDR / TBG570ANDR TBQ530ANDR / TBQ570ANDR TBR527ANDR / TBR565ANDR

III. PARTS IDENTIFICATION

Note : Because of ice expansion, containers with water may deform in the freezer.

3.2 FEATURES

Ice Tray : Can make and store 1 kg of ice cube. Temp Controlled Meat Keeper : The fish and meats which will be cooked within 2 days can store here, no

Evaporation Pan : Water discharged from the refrigerator is evaporated here. Door Racks (F) : Short-term storage of frozen food. Egg Storage Basket : Can store 20 eggs Door Racks (R) : Short-term storage of refrigerated food. Bottle Storage Rack : Can store 5 bottles of beer or soda. Regulator : For regulation of the refrigerator.

thawing is required.

Page 8

TMQ / TMR / TMQ432ANDR

III. PARTS IDENTIFICATION

Note : Because of ice expansion, containers with water may deform in the freezer.

3.3 FEATURES

Ice Tray : Can make and store 1 kg of ice cube. Temp Controlled Meat Keeper : The fish and meats which will be cooked within 2 days can store here, no

thawing is required.

Page 9

4.1 DEFROSTING

4.1.1 No defrosting operation is necessary

No defrosting operation is necessary.

As this machine is so designed that a built-in evaporator cools air and a fan circulates cooled air, neither the freezer nor the refrigerator is frosted, though the evaporator is frosted.

The frosted evaporator is defrosted automatically due to the function of defrosting timer and heater, requiring no defrosting operation.

4.1.2 Where is melted ice brought

IV. FUNCTIONS

i. Melted ice is brought into the

evaporating pan at the bottom of the set and is evaporated here by the heat of sub condenser.

ii. Be sure to use the evaporating

pan as inserted so as to be level with the outer case.

Page 10

IV. FUNCTIONS

4.1.3 The following circuit diagrams in the table show automatic defrosting function of the refrigerator with time

and defrost thermostat.

Operation Electric Diagram Description

Cooling (Normal)

Defrosting (Time 20 to 30 min.)

Fig 1

Fig 2

The integration timer integrates running time of the compressor. When it reaches 8 hours 50 min. at 50Hz, the timer contact is changed to start defrosting.

The timer contact is

changed to start defrosting, the timer motor stops, and power is supplied to the defrost heater.

It takes about 20 to 30

min. to defrost. When little frosted the defrosting takes little time. When much frosted, the defrosting takes much time.

Drain (Time approx. 3 min.)

Cooling (Start) (Time approx. 5 min.)

Fig 3

Fig 4

Page 11

When the defrost thermostat becomes OFF, the timer motor at rest starts running. During the operation time (2 MIN, 48 SEC / 50 Hz) defrosted water is drained outside the refrigerator.

Timer contact is changed

to cooling operation and the compressor starts running and the timer motor stops.

Defrost thermostat contact

becomes ON when its cooled. (Figure F-1)

IV. FUNCTIONS

4.1.4 As a reference to determine the causes of

trouble, malfunction and phenomena are described below. Refer to the following when repairing.

i. Disconnection of defrost heater

As off-cycle defrosting is performed, the defrosting time is extremely prolonged. Each time defrosting is started, the freezer temperature rises and a portion of ice and stored foods are melted.

ii. Melted thermo fuse or opened-circuit

due to the defect of defrost thermostat.

When the above mentioned trouble occurs in cooling operation, the timer motor does not run, defrosting will not take place, and consequently freezing is caused. In the above mentioned condition, when the time shaft is turned by hand to defrost, the timer motor runs during the operation time. However, the motor stops from the time wien the contact is changed, and freezing causes.

4.2 DEW PREVENTION

The hot pipe, namely D P condenser, is arranged around the flange part of cabinet and the C-partition plate, preventing dew from being generated on the cabinet.

Note :

i. D P Condenser pipe may be felt hot if touched

by hand while the compressor is in operation.

ii. If you are asked about this, please explain that

the hot pipe serve to prevent the dew generation.

Note :

As the thermo fuse assembly is intended to prevent dangers, do not use it under shorted condition even for a short period.

Page 12

IV. FUNCTIONS

4.3 INSPECTION OF INITIAL STARTING

4.3.1 Inspection of Cooling Unit

i. Set the temperature control knob to

MAX and check that the compressor starts to operate.

ii. Check that cool air is blown out of

the cold air outlet of the freezer and the refrigerator.

iii. when the compressor does not

work, check that the timer is not set to defrost position.

iv. It takes about an hour and a half or

two hours to put food in the refrigerator after starting operation.

Note :

- After return the temperature control knob to MED position.

- When the refrigerator is operated initially after installed, the compressor may vibrate excessively for 1 to 2 min. However, vibration becomes normal if it is continuously operated.

4.3.2 Inspection of defrost device

Operate the refrigerator for 20 to 30 min. and then check the defrost device in the following procedures. Allow 5 min. to restart the compressor since immediate starting after stopping will cause unsmooth operation.

i. Turn the timer shaft clockwise with

a screw driver. At this time, make certains the timer clinks and the compressor stops.

ii. After more than 5 min., turn the

shaft further to operate. Make certain cooling operation is started again.

Note :

- Its not necessary to switch the timer by changing of source frequency (50Hz 60Hz)

Page 13

IV. FUNCTIONS

Figure 1 - Cooling Unit

Page 14

V. ADJUSTMENT

5.1 COMPRESSOR

5.1.1 Role

The Compressor inhales low temp. and low pressure gas evaporated from Evaporator of the refrigerator, and condenses this gas to high temp. and high pressure gas, and then plays delivering role to Condenser.

5.1.2 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 in the Compressor outside.

v. Be careful that dust, humidity, and flux

due to welding dont inflow in Compressor inside in replacing Compressor. Dust, humidity, and flux due to welding which inflows to Cylinder may cause lock and noise.

On the other hand, because the Compressor consists of 1/1000mm processing precision components and is sealed after producing without dust or humidity, deal and repair with care.

5.1.3 Note to Use

i. Be careful not to allow over

voltage and over current.

ii. No Strike

If applying forcible power or strike (dropping or careless dealing), poor operation and noise may occur.

iii. Use proper electric components

appropriate to the compressor.

iv. Note to keep Compressor

If Compressor gets wet in the rain and dust in the pin of Hermetic Terminal, poor operation and poor contact may cause.

Page 15

V. ADJUSTMENT

5.2 PTC-STARTER

5.2.1 Composition of PTC-Starter

i. PTC (Positive Temperature

Coefficient) is no-contact semiconductor starting device which uses ceramic material and the material consists of BaTiO3.

ii. The higher the temperature is, the

higher resistance value becomes. These features are used as starting device of motor.

5.2.2 Role of PTC-Starter

i. PTC is attached to hermetic

Compressor used for refrigerator, show case and starts motor.

ii. Compressor for household

refrigerator applies single-phase induction motor. For normal operation of single-phase induction motor, in the starting operation flows in both main coil and sub coil. After the starting is over, the current is cut off in sub coil. The proper features of PTC play the above all roles. So, PTC is used as a starting device of motor.

5.2.4 Relation of PTC Starter and OLP

i. If power off during operation of

Compressor and power on before PTC is cooled, (instant shut-off within 2 min. or reconnect a power plug due to misconnecting), PTC isnt cooled and a resistance value grows. As a result, current cant flow to the subcoil and motor cant operate and OLP operates by flowing over current in only main-coil.

ii. 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 cuases circuit-short and fire. Therefore, use a proper fixed OLP without fail.

5.2.5 Note to Use PTC-Starter

i. Be careful to over voltage and over

current.

ii. No Strike.

Dont apply a forcible power or strike.

5.2.3 Motor Restarting and PTC Cooling

i. 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.

ii. During normal operation of

Compressor Motor, PTC elements generate heat continuously. Therefore, if PTC isnt cooled for a while after power off, Motor cant operate again.

iii. Keep apart from any liquid

If liquid such as oil or water inflows into PTC, PTC materials may break due to insulation breakdown of material itself.

iv. Dont change PTC at your

convenience.

Dont disassemble PTC and mold. If damaging to outside of PTCStarter, resistance value alters and poor starting of Compressor motor may cause.

v. Use a properly fixed PTC.

Page 16

V. ADJUSTMENT

5.3 OLP (OVER LOAD PROTECTOR)

5.3.1 Definition of OLP

i. OLP (Over Load Protector) is

attached to hermetic Compressor and protects motor by cutting off current in Compressor motor by Bimetal in the OLP in case of overrising temperature.

ii. When oven voltage flows to

Compressor motor, Bimetal works by heating the heater inside OLP, and OLP protects motor by cutting off current which flows to compressor motor.

5.3.2 Role of OLP

i. OLP is attached to hermetic

Compressor used to refrigerator and show case and prevents motor coil form being started in the Compressor.

ii. Do not turn the Adjust Screw of OLP

in any way from normal operation of OLP.

Page 17

VI. DEODORIZATION WITH PLATINUM

6.1 DEDORIZATION WITH PLATIMUM

6.1.1 This material is used for Deodorization and defrosting because of its high temperature acidification to get rid of odors in the refrigerator.

6.1.2 This is a platinum-based catalyst deodorant evenly coated on the quartz tube. It is a highly active and adhesive metal.

6.1.3 In the refrigerator, the odor passes by the deodorant catalyst and is attracted by the deodorant coated on the quartz tube.

6.1.4 When defrosting, the 250°C heat produced in the quartz tube dissolves the acidified odor and purifies the cold air in the refrigerator.

6.1.5 After defrosting, the clean and odorfree cold air refrigerates the food. At the next defrosting, it carries out Deodorization and this process is repeated.

6.2 APPLICATION OF PLATINUM AS DEODORANT

6.2.1 A fan is used in the frost-free refrigerator

for refrigeration.

6.2.2 The Platinum deodorizer is installed

beneath the cooler at the cold air outlet that cools the freezer compartment. Because the refrigerator is a sealed cabinet, the rotating cool air is forced to rotate by the fan and cause odor to pass through the deodorizer.

6.2.3 When not defrosting, the deodorant is

highly activated and odor is absorbed.

6.2.4 After running for a while and during the

defrosting stage, the heat produced by the defrosting heater that goes through the quartz tube to the deodorant on the surface at over 250°C, causes odor to attach to the deodorizer where it is acidified into pure gas, free of odor.

6.2.5 At the end of defrosting, the fan resumes

work and the high temperature does not go down. The acidified gas causes the deodorant to continue to absorb odor.

Diagram of Defrosting Heater

Page 18

VII. FAILURE DIAGNOSIS

1. Not cold at all (freezing storage and cooling chamber are not cold)

Is the plug being

inserted?

Yes

Is the plug being

inserted?

Yes

Is the voltage over

99V?

Yes

Is the compressor

operating?

Insert the power plug.

Any shutdown? Check the abnormal

power cord or switch

Is a special socket used by the

refrigerator?

Is the geographical environment being

using a special one?

Short the F thermostat and see if the

compressor is operating.

When regulat e D meter to cooling

operation side, is the compressor

operation?

Non-operating

Yes

Operating

Not operated

Operating

* Turn D time to right side till heating two noises

Is a socket affected by other electrical wiring?

Change F-THM, then check is it due to the freon leakage of thermo

Is the temperature fuse

Is temperature switch

sensor or by poor contacting point?

melted?

Engaged

engaged?

Replace the temperature fuse

Replace the temperature

switch

Replace D meter.Engaged

Short the overload protector and see if

the compressor is operation.

Yes

Is the relay of PTC starter normal?

Is the capacitor normal at starting or

The contacting point being poor? Repair the contacting point.

Is the circuit of compressor coil

Ice beads or serious frost formed

Inspection of the frosted cooler

Non defrost

Inspection of freon leakage Freon leakage

No freon leakage

Defective freon circuit Clogged by impurities

The lower pressure tube of compressor fails to such the air.

in the cooler chamer

Check the leakage location

operating?

Freon circuit clogged

Non-operating

Yes

normal?

Operating

Abnormal

Yes

Abnormal

Poorly

defrosted

Poor compression of

the compressor

Replace the overload

protector.

Replace the relay of PTC

starter.

*Impedance short (0Ω) and poor circuit (0∞)

Replace the capacitor.

*In case of the normal item, the needle of the panel will become (∞Ω) after one vibration.

* Remove the pin from the connecting point and check if it has turned into black.

Replace the compressor and

drying filter.

* Check the circuit of mail coil, auxiliary coil and resistance value.

Refer to the mothod of non-

defrost

Poor location be repaired.

Replace the compressorm

drying filter. Clean the freon

circuits.

* When the inner side of compressor is too dirty, it must be replaced.

Replace the clogged parts.

Replace the drying filter.

Clean the freon circuit

Replace the compressor,

drying filter. Clean the freon

circuit.

Page 19

2. Not cold enough

VII. FAILURE DIAGNOSIS

Is the turn button set at "MAX"

position?

Setting the temperature of

each chamber in the storage.

High temperature

Set the turn button to

"Medium" and confirm

High temperature

in the freezing storing

and the cooling

chamber

Is the storage environment

appropriate?

Yes

Is the storing method of the

food inside the storage room

appropriate?

Yes

Only freezing

room (including

0°C room)

No Yes

Is the turn button set at "MAX"

position?

Confirm the bumper cohesion

of bumper thermostat

Opened

Any clearance at the door

knob?

The ambient space of the

refrigerator being too small

The ambient temperature of

the refrigerator being too high.

Fully closed

Yes

Replace bumper thermostat

(Freon leakage at the thermo

sensor of bumper thermostat)

Adjust door and replace the

door knob

Frequent opening of door.

Insufficient convection of cold

air due to over loaded food.

Adjust the storing place of

refrigerator

Avoid direct sun beam or

move the gas stove away from

the refrigerator.

Note if the food stored inside

the storage room being too

much.

Yes

The clearance of door knob

Mist and frost formed at the

top of freezing chamber and

quick freezing chamber.

Will F thermostat become cold

after the short circuit?

Is the fan in the storage room

operated normally?

Yes

Confirm the frosting of the

cooler.

Frozen or frosted in

the cooler chamber

Yes

Is the motor of fan operated

normally?

Inspect the freon leakage

location

Poorly defrosted

Adjust door and replace door

Replace the motor of fan

YesMinor frost

Defect repairs and replace the

Refer to the method of non-

knob

Replace F thermostat

drying filter

defrost

Page 20

3. Fail to Defrost

VII. FAILURE DIAGNOSIS

Confirm the frosting of the cooler

frost

Is the coil circuit of D meter working? Replace D meter (broken coil)

Yes

Turn the pin of D meter to defrost side. Is the

circuit of defrost heater working?

Is the circuit at the defrost side of D meter

working?

Yes

Short circuit at the temperature switch, is the

circuit of defrost heater working?

Is the circuit of defrost heater working? Replace the defrost heater.

Lesser frost

Green & black circuit of D

meter

Defrost

Yes

Green & black circuit of D

meter

Yes

Clearance of door knob and forget to close the

Agent

Replace D meter (poor operation of D meter)

Replace D meter, (poor contacting point)

freezing chamber door.

Replace the temperature switch.

Yes

Is the circuit of temperature fuse working? Replace temperature fuse.

Yes

Is the circuit of water dripping tray working? Inspect the heater of water dripping tray.

Yes

Clean the water and impurities in the water

dripping tray.

Page 21

4. Too cold

VII. FAILURE DIAGNOSIS

Is the turn button set at "Strong Position"? Turn the button at "Weak" Position.

Temperature set of each chamber in the

storage room.

Turn all the buttons to

"Medium" for confirmation.

Low temperature

Confirm the cohesion of bumper thermostat Replace the bumper thermostat

Closed

Mist and frost formed at the top of freezing

chamber and quick freezing chamber.

* If setting the button of the freezing chamber at

"Strong" while the cooling chamber is at "Medium",

then the cooling chamber and fressness-keep

chamber will become too cold.

Is the ambient temperature below 5°C?

Only for the freezing of food near the suction

outlet of bumper thermostat.

* When the food containing more moist (bean curd,

vegetable, fruit, etc) is placed at the inner side of shelve or the freshness-keep chamber, then the food would be easily frozen. So, it is necessary to change

* Use ice to cool the thermo sensing part for confirmation.

* Freezing phenomenon formed at the bumping part of the

Yes

the storage method.

Opened

Yes

bumper thermostat.

YesNormal

Yes

Turn the button to "Weak" position.

Change the storing method of the food.

Forget to close the freezing chamber door.

Repair the contact of food and door rail.

* When the bumper thermostat is replaced

due to poor cooling, be sure not to install the

cooling chamber bumper correctly and it must

be secured on the original leverage.

* Put iced water in to the cup or placed it into

the freezing chamber to cool it down, so as to

confirm the action of the bumper.

Page 22

5. Unusual Noise

VII. FAILURE DIAGNOSIS

Unusual noise during the compressor running

in the mechanical room.

If any unusual noise of the fan (upon opening

the door)?

unusual

noise

Yes

Yes Yes

Is the ground horizontally flat?

Yes

If the mechanical piping being slanted or

contacted.

If all the piping in the mechanical room are

resonant.

Inspect the vibration of compressor and adjust

the rubber pad to reduce vibration.

Check if the fan is contacting EV cover or the

grate.

Inspect the assembly of fan and grate and

adjust it to create air tightness with the inner

case.

Yes

Adjust by the adjusting foot.

Be properly adjusted.

Adjust the location of counter-weight

Change the storage method of the food.

Press down the fan to the end to confirm that

the fan will not contact the grate.

Unusual noise in D meter

Open the electrical case and replace new D

meter.

Page 23

VII. FAILURE DIAGNOSIS

g o

sto

High

refri

C. Slight air leakage A. Too much freon.

Discharge tube temp. being

(suction tube)

E. Clogged by dusts

Slight raise of heatdissipater

tube.

High suction pressure.

not too high.

temperature

Frosted or fogged suction

Low suction pressure Fair heat dissipater temp. High current & power

over -18°C

and heat dissipater

Inadequate coldness

High temp. at discharge tube

Evaporator temperature being

Low current & power

Frosting being clogged

Almost no frosting

Inadequate coldness

Without flowing sound

Almost no frosting

Poor freezing effect

Low current & power

Cycle frost & mist

Change of current & power

Change of suction pressure

Inadequate coldness

High current & power

Frosting being clogged

Low suction pressure

Low heat dissipater temp.

Low discharge tube temp.

Intermittent raise of

dissipater temperature

Intermittent raise of heat

Intermittent flowing sound

Low suction pressure

compressor temperature

clogged by dust

Unusual noise at the

High compressor temp.

discharge section due to

D. Water clogging B. Insufficient Freon

exhaust

F. Dusts clog the

cannot be

condensated.

G. Containing air that

I. Air leakage

dissipator not raised

Temperature at the heat

High current & power

High suction pressure

low

low.

Without flowing sound Low current & power Low suction pressure

Current & power being too

Temp. discharged being too

Inadequate temperature

Being not cold

Inadequate coldness

Normal frosting

Page 24

Low current & power

High suction pressure

High current & power

Low heat dissipater temp

Sound of oil flow

Normal suction pressure

suction tube

cannot be frosted

No temperature difference

between discharge tube and

No flowing sound and almost

J. Over filled oil H. Poor compressing

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

Refrigerator fails to operate

Electric current meter remains still

Instant power stop of major motor

Electric power 1. Power cord not being

engaged

Compressor

Relay Broken electrical heating

Control Switch

Defrost Switch 1. Poor practice

Compressor

1. Broken main coil of the motor.

2. Broken wiring of the refrigerator.

wire

1. Button set at OFF position.

2. Poor practice

3. Air leakage (freon).

1. Choking

2. Short circuit between motor

Any power shut off or

melted fuse?

Replace the

compressor

Check & repairs

Replace the relay

Replace the control

switch

Replace the control

switch

Replace the control

switch

Replace the defrost

switch

Replace the

compressor

Replace the

compressor

Defrost switch fails to recover or longer time needed for recovery

3. Broken auxiliary coil of the motor.

Starter

Capacitor 1. Burnt out

Power 1. Abnormal voltage

Defrost switch

1. Poor practice

2. Poor contacting point

1. Poor practice

2. Low room temperature

Page 25

Replace the

compressor

Replace the starter

Contacting point be

polished or replaced with a new one.

Replace the capacitor

Explanation for the

customer.

Replace the defrost

switch

Explanation for the

customer.

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

Operation time being too long

Compressor fails to control the stop

Bigger power consumption

Control Switch 1. Poor practice

Door Knob

Others

Control Switch 1. Inappropriate position

Electric power 1. Voltage being too high.

Others

1. Poor knob

2. Poor door clearance

1. Too much food being stored.

2. The food stored being too warm.

3. Door opening being too frequent.

4. Improper storage location.

of turn button.

1. Too much food being stored.

2. Improper storage location.

Replace the control

switch

Replace the door knob

Be adjusted.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Temperature being too low

Control Switch

1. Inappropriate position of turn button.

2. Poor contact between thermo-sensing tube and evaporator.

3. Poor practice.

Page 26

Explanation for the

customer.

Be adjusted.

Replace the control

switch.

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

The refrigerator being operated but not cold.

Not cold at all Freezing System

Not cold even after longer time of operation

Freezing system

Door knob

Evaporator 1. Too thick of frost

Control Switch 1. Inappropriate position

1. Freon leakage.

2. Clogged by dusts and moisture.

3. Defective pressure exhaustion.

1. Insufficient freon

2. Clogged by dusts and oil

3. Poor discharge

1. Poor clearance of door knob

2. Defective door knob

of the turn button.

Replace / Repair the

freezing system

Replace / Repair the

freezing system

Replace / Repair the

freezing system

Replace / repair the

freezing system

Replace / repair the

freezing system

Replace / repair the

freezing system

Be adjusted.

Replace the door

knob.

Explanation for the

customer.

Explanation for the

customer.

Motor of the fan 1. Fails to turn.

Condenser 1. Being dirty or poorly

ventilated.

Others

1. Too much food being stored.

2. Door opening being too frequent.

3. Improper storage location.

Page 27

Defrost switch, door

opening and wiring be Inspected.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

Noise

Louder noise during the operation and at start, stop

Vibration during start, stop and operation (noise heard from the stored food and from the articles on the board)

Compressor

Contacting vibration of each part.

Noise from the evaporating tray

Installation

Tubing

Compressor 1. Screw locking being

1. Being unusual inside.

2. Poor installation.

3. Voltage being too low (below 90V).

4. Contacting noise

1. Poor installation and fixed contact.

1. Inappropriate position of the evaporating tray.

2. Poor flatness of base.

1. Poor leg regulating.

2. The floor being to weak.

1. Tubing contact.

2. Poor shock absorption of the tubing.

too tight.

Replace the

compressor.

Be adjusted.

Explanation for the

customer.

Be adjusted.

Explanation for the

customer.

Be adjusted.

Explanation for the

customer.

Be adjusted.

Page 28

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

Sweating

Sweating at the outer surface

Overflow or leakage or internal sweating

Insulator

Anti-mist electric heater.

Others

Door

Drainage device being clogged

1. Poor mounting method.

2. Poor heat-insulating of the tubing.

3. Wet insulator.

1. Broken wires.

2. Poor wiring.

1. Humidity being very high.

2. Being stored highly humidified place.

3. Incorrect using method

4. Poor generator being installed

1. Poor clearance of door sealing gasket.

2. Loosen door opening

1. Poorly sealed drainage valve.

Accurate installation.

Add more insulator.

Replace the insulator.

Replace the anti-mist

electric heater.

Inspection & repairs.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

Improve the

installation and replenish the insulation.

Replace the door

sealing gasket.

Be adjusted.

Poor method being used

Dripping tray being unable to sustain the frosted water.

2. Clogged drainage tube.

1. Moisturized food being unwrapped.

2. Frequent opening during summer time.

1. Inappropriate storing location.

Page 29

Clear for draining.

Explanation for the

customer.

Explanation for the

customer.

Explanation for the

customer.

VII. FAILURE DIAGNOSIS

CAUSES & TREATMENT OF REFRIGERATOR FAILURES

Phenomenon Failure Condition Inspection Part Causes Treatment Actions

Other

Electricity leakage

Door opening being not smooth

Door opening lamp not shown

Wiring & other electrical appliances

Door hinges and stop lever.

Door knob 1. Defective clearance

Internal 1. Slanted door.

Lamp switch inside the refrigerator.

Lamp inside the refrigerator

1. Insulation defect.

2. Static capacity

1. Loosening fixed part

2. Poor practice

3. Wearing

1. Defective contact

1. Broken wires

2. Poor lamp holder

3. Defective wiring

Repair the defective

part, and provide explanation for the customer, or use earthing termina.

Repair the defective

part, and provide explanation for the customer, or use earthing termina.

Be adjusted.

Be replaced.

Door be adjusted.

Be adjusted or

replaced.

Be adjusted.

Be inspected or

repaired.

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