Haier HRF10WNDWW User manual

Order NO.Ref0907S005V0
◎2009(HAIER ELECTRICAL APPLIANCES COR. LTD)
Allrightreserved.Unauthorizedcopyinganddistributionisaviolationoflaw.
Refrigerator
SERVICE MANUAL
MODEL: HRF10WNDWW
HRF12WNDWW
Haier Group
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It
dose not contain warnings and cautions to advice non-technical individuals of potential dangers in attempting to service a product.
Product powered by electricity should by serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
WARNING

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Contents
Table of Contents ················································································································2
1. General Information······································································································3
1-1. General guideline ····································································································· 3
1-2. Insurance Test ········································································································· 3
1-3. How to read this Service Manual·············································································· 4
2. Product Feature ············································································································5
2-1. Specifications ··········································································································· 5
2-2. External views ·········································································································· 7
2-3.Function schedule ··································································································· 7
3. Disassembly and assembly ·························································································8
3-1. Air passage disassembly·························································································· 8
3-2. thermostat disassembly···························································································· 9
3-3.Door disassembly····································································································· 11
4. System flow principle···································································································12
4-1. Refrigeration flow chart··························································································· 12
4-2. Flow of cold air ······································································································· 12
5. Circuit diagram·············································································································· 13
5-1. Brief principle diagram···························································································· 13
6. Trouble shooting···········································································································14
6-1. Poor cooling ··········································································································· 14
6-2. No defrosting·········································································································· 15
7. Quick check··················································································································· 17
7-1. Normal phenomena································································································ 17
7-2. Common Troubles in Refrigerators and Their Remedies ······································· 18
7-3. Analysis of Troubles ······························································································· 21

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Chapter 1 General Information
1-1. General Guidelines
When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have
been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices
such as insulation barriers, insulation papers shields are properly installed. After servicing, make the
following leakage current checks to prevent the customer from being exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatic Sensitive
1-2. Insurance Test
1. Check if there is any leak of current.
2. Cut out the power supply before the repair to avoid an electrical shock hazard.
3. In the case of a live-line test, insulating gloves should be worn to avoid potential electrical shock.
4. Confirm the rated current, voltage and capacity before testing with any kinds of instruments.
5. Watch if the upper door is open when we check something at a lower position.
6. Take out every part in the cabinet before moving the machine, especially things like panels (e.g.
glass shelf).
7. Please wear intact cotton gloves when repair any parts of the evaporator, so that scratches by
the sharp fins can be avoided.
8. If there is a breakdown with the refrigeration system, please surrender the machine to the service
center, else the leaked refrigerant may pollute the atmosphere.
9. The refrigerator use AC of 115V with a frequency of 60Hz.
10. A big fluctuation of voltage (exceed the range 100～120V) may cause a start failure of the
refrigerator, a burn-out of the control panel and compressor, or an abnormal sound from the
compressor in operation.
11. Take care not to damage the supply line. Don’t yank at the line; pull the plug out gently from the
receptacle. Don’t press the line under the cabinet or step on it. Take care not to roll on or damage the
supply line when moves the machine from the wall.
12. In the case of leakage of inflammable gases like carbon monoxide, open the door and windows.

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Don’t pull out or insert the plugs of the appliance.
13. Don’t touch the refrigeration surface of the freezing compartment when the refrigerator is in
operation, especially when our hand is wet, else we may be glued to the surface.
14. Pull out the plug of power supply during clearance or power outage. Wait at least five minutes to
resume the power supply in order to prevent damage to the compressor caused by continuous restart.
Photo used in this manual
The illustration and photos used in this Manual may not base on the final design of products, which may
differ from the products in some way.
1-3. How to read this Service Manual
1-3-1. Using Icons
Icons are used to attract the attention to specific information. The meaning of each icon is described in the
table below:
Note:
A “note” provides information that is not indispensable.
Caution:
A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage
equipment, loose data, get an unexpected result or has to restart (part of) a procedure.
Warning:
A “warning” is used when there is danger of personal injury.
Reference:
A “reference” guides to find additional information on a specific topic.

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Chapter 2 Product Feature
2-1. SPECIFICATIONS
Photo
Model HRF-10WNDWW HRF-12WNDWW
Commercial brand Haier Haier
Product description Refrigerator Refrigerator
Type of appliance (FS=free standing / BI= built-in) FS FS
Climate class (N=16-32℃ST=16-38℃
T=18-43℃) T T
Key features
Gross capacity L 286 343
Total net capacity L 283 340
Defrosting (Manual-Automatic) Automatic Automatic
Defrosting water outlet Yes Yes
Air circulating ventilator Yes Yes
Kind of coolant (R134a/R600a) R134a R134a
Foaming components CP-IP CP-IP
Technical data
Voltage / frequency V/Hz 115~ / 60 115~ / 60
Input power W /A 60
Length of cable / incl. plug cm 200 200
Temperature range (from>to) °C 4～-18 4～10
Aesthetics
Colours

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Top cover White White
Cabinet White White
Door glass White White
Door frame White White
Fascia panel/handle White White
Door
F=Flat/R=Rounded/S=Streamline S S
Hinge (r=right/l=left/reversible) r/reversible r/reversible
Shelves
Number 4 4
Tape grill grill
Colour White White
Adjustable Yes Yes
Drawer numbers 1 1
Crisper Transparent Transparent
Equipment & accessories
Control panel
Control panel (interior/exterior) interior interior
Thermometer (interior/exterior) interior interior
Adjustable thermostat Yes Yes
Interior light W 10 10
Adjust feet Front Front
Castors Rear Rear
Product net dimensions
Unit dimensions (H / W / D) mm 1540/600/651 1540/600/726
Depth of open door mm 1245 1320
Net weight Kg 62 68
Packing dimensions & load ability
Packing dimensions (H / W / D) mm 1570/655/737 1570/655/812
Gross weight kg 69 75

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2-2. External views
2-3. Function Schedule
1. Air-cooling and automatic defrosting
2. Round door design and fashion handles
3. Energy-saving
4. Adjustable humidity crisper
5. Isolated food shelf
6. Crisper with adjustable moisture
Moisture in the crisper can be adjusted for satisfaction of vegetables and fruits storage.
A= freezer shelf B= thermostat C= shelf D= crisper cover E= crisper F= door shelf
G= coke shelf H= butter tray

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Chapter 3 Disassembly
3-1. Air passage disassembly
1
Use the Cruciform screwdriver to remove the four screws
which fixed the air passage cover.
2
Hold the protruding part of the air passage cover with our
hands, Shake it slightly to loose it, and then take off the
air passage cover.
3
In the disassembly process, pay an attention to the cable
behind the air passage cover, disconnect the cable
terminals, and then we could disassemble the cover.
4 We assemble it according to reverse order.

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3-2. Thermostat disassembly
1
Use the Cruciform screwdriver to take off the three
screws which fixed the thermostat house.
2.
Pay an attention to cable connection part in disassembly
process, disconnect the cable terminals and then we
could take off the thermostat house.
3
Removed the original thermostat ,take the new
thermostat probe to the zone for Feeling temperature of
the thermostat house
4
Then use the Aluminum foil tape to seal the temperature
probe
5
The connection of the thermostat :C connect to brown
cable, L connect to red cable and green cable connect to
grounding

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6
The insert terminals of the Thermostat cable connect to
the defrost timer and Purple cable connect to the lamp
seat .It must be fixed the defrost timer to the thermostat
house with screws.
7
Make sure to seal the sponge of the thermostat openings
to prevent the cold air leaking.
8. We assemble it according to reverse order.

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3-3.Door disassembly
1
Use the cruciform screwdriver to take off the screws
which fixed the top hinge cover, and remove the hinge
cover.
.
2.
Remove the screws which fixed the top hinge, And take
off the top hinge.
3
Take off the screws which fixed the central hinge
4
Hold the REF and FRZ door with our hands and drag it
slightly, and then we could take off the door.

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Chapter 4 Disassembly
4-1. Refrigeration flow chart
4-2.Flow of cold air
1 Compressor
2Condenser
3Filter drier
4Capillary tube
5Evaporator
6Fan motor
A=freezer door B=bottle shelf C=cold air suction hole D=egg box cover E=bottle shelf
F=bottle shelf G=vegetable container H=bottle shelf I=Ref door J=FRZ fan motor K=wire
L= evaporator N=Ref air passage O=vegetable container cover P= compressor

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Chapter 5 Circuit diagram
5-1. Brief principle diagram
Brief Description of Control Principle
HRF12 is the forced air cooling refrigerator with two doors. A mechanical type of all the control is
generally adopted. The thermostat directly controls the start and stop of compressor, and hence the
refrigerator temperature.
Low Temperature Compensation in the above schematic diagram, When the ambient is below the set
temperature, the switch will be closed and the heating will work, thus ensuring the normal start, and
operation of refrigerator at lower ambient temperature, in such case, the freezer compartment temperature
can reach a good point.
A =plug B=switch C=lamp D=ice maker (preparative) E=valve (preparative)
F=thermostat G=defrost timer H =thermostat I=defrost heater J= fuse
K=fan motor L=fan motor M=overload protector N=compressor O= (PTC)

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Chapter 6 Trouble shooting
6-1. Poor cooling

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6-2. No defrosting

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Chapter 7 Quick check
7-1. Normal phenomena
In a domestic refrigerator, there is not only a complicated electric control system, but also a
refrigerating system that is difficult to discern whether it is in a good working condition. Both the
systems are related and affect each other. If a certain part of a refrigerator works abnormally .Its
refrigerating efficiency will decrease, operation properties will become unstable, or even it cannot be
used normally for those serious cases. Refrigerators are generally of larger volume ,once troubles
appear ,to send them to a service department is really a tough thing ,if such is the case ,the user will
always be in suspense ,sometimes ,normal phenomena will be erroneously regarded as
troubles .Therefore ,before we deal with the topics of frequently occurring troubles of refrigerators
and their remedies ,we should firstly give a brief account of some normal phenomena which are not
troubles .In case any one of such phenomena occurs ,there is no need to worry about it ,and the user
can use it at total ease .
1). When the compressor of a refrigerator has just stopped running, a rumbling sound can be heard
from inside its evaporator .This is a sound caused by the flowing of refrigerant in the evaporator
tubing .Because the pressure difference is still greater after the compressor has just stopped running,
the refrigerant will flow for a certain time, therefore, this sound is a normal phenomenon.
2). A click sound can often be heard from the refrigerator .This is a normal sound produced by the
pull-in or release of the armature of a current deadweight start relay when starting the
compressor .The compressor motor will produce a slight and uniform sound while it is running .This
sound is not easy to be heard in the daytime, but of course it can be heard distinctly at night.
3). The compressor consists of an electric motor and a compressing apparatus .During its normal
operation ,the motor’s stator core and windings will rise to a temperature in the range of
100℃~110℃,and the temperature of the piston and cylinder of the compressing mechanism can also
reach as above 100℃due to the heat produced when compressing refrigerant .Most of the heat
radiates to the air through the compressor casing ,therefore ,its casing is generally at a temperature
between 85℃~90℃,it is very hot ,particularly in summer when the ambient temperature is higher .All
these are normal phenomena .

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4). For the direct cooling refrigerator ,a kind of irregular crack sound can be often heard when the
compressor is running for a certain period of time or has just stopped its running .This sound is caused
by the stress relief due to expansion and contraction when temperature changes ,and will not affect
the normal application of refrigerator .
7-2 Common Troubles in Refrigerators and Their Remedies
Causes for troubles occurring in refrigerators are closely related to the quality of components and
workmanship in assembling by manufacturers as whether refrigerators are properly used and
maintained .The parameters generally used to express the working conditions of a refrigerator include
the temperature inside the refrigerator ,operation rate ,electric power consumption ,noise level ,and
other functional indexes .If any one of these parameters is beyond its permissible range ,this indicates
that there is a fault or trouble in the refrigerator . During the whole service life of a refrigerator ,the
probability of troubles occurring within a union time is called its failure rate .Making a comparison
between the control circuit system of a refrigerator and its refrigerating system ,we can find that the
failure rate of the former is higher ,and that of the thermostat is the highest . In troubleshooting ,the first
thing you must do is to determine where the trouble comes from --- the control system or the
refrigerating system .There is general no trouble indicating instrument mounted on the domestic
refrigerator ,locations and natures of troubles should be determined according to their respective
features ,therefore ,experience in servicing is very important to troubleshooting .Service technicians
with rich experience can correctly locate them and take reasonable remedy measures based on their
comprehensive analysis of trouble characteristics as well as operating conditions for various kinds of
refrigerators .
Three Essentials for Checkup
1) Look
a) Check the tubing of refrigerating system for cracks and various welding points for leaks ;if leakage
occurs ,an oil stain can be seen definitely .
b) Check the suction and exhaust pressure values (high pressure and low pressure) of compressor to
see whether they are normal.
c) Check the conditions of frost attached to its evaporator and gas return tube .It is abnormal if frost

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has formed on part of the evaporator or there is no frost attached to it.
d) Pay attention to the speed of temperature drop inside freezer compartment .It is abnormal if the
speed of temperature drop is obviously slower than the corresponding normal speed.
e) Check the environment to see whether it is suitable for placing a refrigerator.
f) Check refrigerator door seal, case, table surface and heat insulation layer.
g) Look at the main control board to ascertain if various indication states are normal.
2) Listen
a) Listen to the noises produced when the compressor is running Hums from a fully enclosed
aggregate unit is the sound caused by overload indicating that the motor cannot be started
normally ,meanwhile ,a clattering sound can be heard from inside the start relay ,which is produced
because the start contacts cannot be released normally .A whistling sound is caused by the high
pressure gas flowing out of the crack of the pressure tube inside the compressor ,and clucks are the
sound of striking after the suspended spring inside the compressor has broken . During the normal
operation of compressor ,a slight and uniform hum sound due to undulation of electric current can be
heard generally ,this is a normal phenomenon .However ,if it sounds like “tong ,tong …”,i.e., an impact
sound inside the compressor ,this means that a large quantity of wet vapour of refrigerant or
refrigerating oil has come into the compressor cylinder ;if it sounds like “dang ,dang…”, a striking
sound of metal parts inside the compressor ,this means that some moving parts have loosened (note
to differentiate this sound from those formed during starting or stopping the compressor).
b) Listen to the sound caused by the flowing of gas in the evaporator Open the refrigerator door while
the compressor is in operation ,incline your ear and listen attentively the gas flow sound inside the
evaporator .If it sounds like gentle whistling accompanied by a sound similar to water flowing ,this is
the sound produced by the normal circulation of refrigerant within the evaporator .In case only the gas
flowing sound can be heard and there is no water flowing sound ,this indicates that the refrigerant has
already percolated .If neither the flowing sound nor the gas sounds from the evaporator can be
heard ,this means that the filter or capillary has been clogged .
3) Touch and Feel
a) Feel the compressor when running, its temperature should be generally less than 90℃in the
normal state (it may exceed 90℃in case of running for a longer period of time ).
b) After the compressor has operated normally for 5~10 minutes, ouch and feel the condenser, the

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temperature of its upper part should be higher than that of its lower part (or its right part is hotter than
its left part, depending on the type of condenser coil), this indicates that the refrigerant is circulating. If
the condenser is not hot, this means the leakage of refrigerant .In case the condenser radiates heat for
only several minutes and then cools down, this means that the filter and capillary have been
clogged .As for the forced air cooling condenser, hot air will be blown out of it; this means that the
system is out of order.
c) Feel the filter’s temperature .During the normal operation of refrigerating system ,the temperature
on the filter’s surface should be a little higher than the ambient temperature ;if you touch it with your
hand ,you will have a sense of slight heat .In case dew condensation appears due to the fact that its
temperature is obviously lower than the ambient temperature ,this means that most meshes of its
screen has been clogged ,resulting in an obstructed flowing of refrigerant ,thus causing a drop in
temperature due to throttling .
d) Feel the temperature of exhaust gas from the refrigerating system .the exhaust gas should be very
hot and this is the normal working state .For those refrigerator with enclosed type of compressor
refrigerating system, no frost or dew drop will from on the gas suction tube, otherwise, there is
something wrong in the system (Frosting and dew condensation may appear for a very short time
period when just starting the machine, this is a normal phenomenon). Because a refrigerator is a
combination of several components ,they are related and have influence on each other .In case an
abnormal phenomenon has been found through the above-mentioned checkups ,you need not to
make a hasty conclusion based on only one abnormal phenomenon .It is advisable to find out two or
more abnormal phenomenon ,or conduct troubleshooting comprehensively with the aid of instruments
or other ways ,because several kinds of troubles may share a common abnormal phenomenon ,and
two or more abnormal phenomena may occur simultaneously due to a certain trouble .With this
method ,you can reject some suspicious troubles and finally make a correct judgment .