GE TBG440ANDR User manual

gGE 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)

Page 2
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 per-
forming 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 fas-
tened.

Page 3
THE MANUAL COVERS THE
FOLLOWING MODELS
MODEL # COUNTRY
TBR427ANDR
TBR463ANDR
TBR527ANDR
TBR565ANDR
TMR432ANDR
AUSTRALIA
N/A BANGLADESH
N/A CHINA
TBQ440ANDR
TBQ470ANDR
TBQ530ANDR
TBQ570ANDR
TMQ432ANDR
HONG KONG
N/A INDIA
TMG432ANDR INDONESIA
N/A JAPAN
N/A KOREA
N/A MALAYSIA
N/A PAKISTAN
N/A PHILIPPINES

Page 4
THE MANUAL COVERS THE
FOLLOWING MODELS
MODEL # COUNTRY
TBQ440ANDR
TBQ470ANDR
TBQ530ANDR
TBQ570ANDR
TMQ432ANDR
SINGAPORE
N/A TAIHITI
N/A TAIWAN
TBG440ANDR
TBG470ANDR
TBG530ANDR
TBG570ANDR
TMG432ANDR
THAILAND
TMG432ANDR VIETNAM

Page 5
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 6
II. SPECIFICATIONS
565 / 570
ANDR
527 / 530
ANDR
463 / 470
ANDR
427 / 440
/ 432
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
Fancooling ****
NewRoundFace&ArcDesign ****
Exterior
RecessedHandle ****
AutomaticDefrostingSystem ****
Interior Lamp
TransparentPlasticShelf ****
TwistedIceTray ****
Freezer
TransparentDoorRacks ****
DeodorizingDevice ****
MultiAirFlow ****
TemperatureControlledMeatKeeper ****
TransparentShelfwithSteelFrame ****
LargeInteriorLamp ****
Vegetable Crisper with Moisture Control * *
Traditional Vegetable Crisper * *
TransparentDoorRacks ****
LargeBottle/BeerStorageRack ****
Refrigerator
Egg Storage Bucket ****
SilverGray ****
Navy Blue * *
Color
WineRed ****
W 754 754 674 674
H 1803 1701 1776 1676
Net Dimension (mm)
D 690 690 660 660
W 824 824 744 744
H 1881 1779 1844 1744
Packing Dimension (mm)
D 780 780 780 780
TBR / TBQ / TBG 570 ANDR
TBR / TBQ / TBG 530 ANDR
TBR / TBQ / TBG 470 ANDR
TBR / TBQ / TBG 440 ANDR
TMG / TMR / TMQ432 ANDR

Page 7
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
thawing is required.
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.
TBG440ANDR / TBG470ANDR
TBQ440ANDR / TBQ470ANDR
TBR427ANDR / TBR463ANDR

Page 8
III. PARTS IDENTIFICATION
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
thawing is required.
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.
Note : Because of ice expansion, containers with water may deform in the freezer.
TBG530ANDR / TBG570ANDR
TBQ530ANDR / TBQ570ANDR
TBR527ANDR / TBR565ANDR

Page 9
III. PARTS IDENTIFICATION
TMQ / TMR / TMQ432ANDR
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.
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.

Page 10
IV. FUNCTIONS
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
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 11
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)
Fig 1
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.
Defrosting
(Time 20 to 30 min.)
Fig 2
·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.)
Fig 3
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.
Cooling (Start)
(Time approx. 5 min.)
Fig 4
·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)

Page 12
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.
Note :
As the thermo fuse assembly is
intended to prevent dangers, do not use
it under shorted condition even for a
short period.
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.

Page 13
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 14
IV. FUNCTIONS
Figure 1 - Cooling Unit

Page 15
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.
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.
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.

Page 16
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.
5.2.3 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.
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 sub-
coil 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.
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 PTC-
Starter, resistance value alters and
poor starting of Compressor motor
may cause.
v. Use a properly fixed PTC.

Page 17
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 over-
rising 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 18
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 odor-
free cold air refrigerates the food. At
the next defrosting, it carries out
Deodorization and this process is
repeated.
Diagram of Defrosting Heater
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.

Page 19
VII. FAILURE DIAGNOSIS
1. Not cold at all (freezing storage and cooling chamber are not cold)
Is the plug being
inserted? Insert the power plug.
No
Is the plug being
inserted?
Any shutdown? Check the abnormal
power cord or switch
No
Is the voltage over
99V?
Is a special socket used by the
refrigerator?
No Is a socket affected by other electrical wiring? No
Yes
Yes
Is the geographical environment being
using a special one?
Yes
Is the compressor
operating?
Short the F thermostat and see if the
compressor is operating.
Yes
No Change F-THM, then check is it due to the freon leakage of thermo
sensor or by poor contacting point?
Operating
When regulat e D meter to cooling
operation side, is the compressor
operation?
Is the temperature fuse
melted? Replace the temperature fuse
Operating
Not operated
No
Is temperature switch
engaged?
Replace the temperature
switch
No
Engaged
Replace D meter.Engaged
Non-operating
* Turn D time to right side
till heating two noises
Short the overload protector and see if
the compressor is operation.
Operating Replace the overload
protector.
Is the relay of PTC starter normal? Replace the relay of PTC
starter.
Abnormal
Yes
Non-operating
Is the capacitor normal at starting or
operating? Replace the capacitor.
Abnormal
*Impedance short (0
Ω
) and poor circuit (0
∞
)
*In case of the normal item, the needle of the
panel will become (
∞Ω
) after one vibration.
Yes
The contacting point being poor? Repair the contacting point.
Yes
* Remove the pin from the connecting point and
check if it has turned into black.
No
Is the circuit of compressor coil
normal?
Replace the compressor and
drying filter.
Abnormal
* Check the circuit of mail coil, auxiliary coil
and resistance value.
Inspection of the frosted cooler Poorly
defrosted
Refer to the mothod of non-
defrost
Ice beads or serious frost formed
in the cooler chamer
Inspection of freon leakage Freon leakage
Poor location be repaired.
Replace the compressorm
drying filter. Clean the freon
circuits.
No freon leakage
Check the leakage
location
* When the inner side of compressor is too dirty,
it must be replaced.
Defective freon circuit Clogged by impurities
Replace the clogged parts.
Replace the drying filter.
Clean the freon circuit
Non defrost
Freon circuit
clogged
Poor compression of
the compressor
Replace the compressor,
drying filter. Clean the freon
circuit.
The lower pressure tube of
compressor fails to such the air.
Yes

Page 20
VII. FAILURE DIAGNOSIS
2. Not cold enough
Is the turn button set at "MAX"
position?
Is the turn button set at "MAX"
position?
Yes
Setting the temperature of
each chamber in the storage.
Confirm the bumper cohesion
of bumper thermostat Replace bumper thermostat
No Only freezing
room (including
0°C room) Fully closed
High temperature
Set the turn button to
"Medium" and confirm
Opened
Any clearance at the door
knob?
Adjust door and replace the
door knob
(Freon leakage at the thermo
sensor of bumper thermostat)
Yes
Frequent opening of door.
Insufficient convection of cold
air due to over loaded food.
No
Is the storage environment
appropriate?
The ambient space of the
refrigerator being too small
Adjust the storing place of
refrigerator
High temperature
in the freezing storing
and the cooling
chamber
No Yes
The ambient temperature of
the refrigerator being too high.
Avoid direct sun beam or
move the gas stove away from
the refrigerator.
No
Yes
Is the storing method of the
food inside the storage room
appropriate?
Yes
Note if the food stored inside
the storage room being too
much.
No
The clearance of door knob Adjust door and replace door
knob
Yes Yes
Mist and frost formed at the
top of freezing chamber and
quick freezing chamber.
No
Will F thermostat become cold
after the short circuit? Replace F thermostat
No
Yes
Is the fan in the storage room
operated normally?
No
Is the motor of fan operated
normally? Replace the motor of fan
No
Confirm the frosting of the
cooler.
Inspect the freon leakage
location
Defect repairs and replace the
drying filter
YesMinor frost
Yes
Poorly defrosted
Frozen or frosted in
the cooler chamber Refer to the method of non-
defrost