Order No. Ref1010S025V0
©
2010 (HAIER ELECTRICAL APPLIANCES COR. LTD)
All rights reserved. Unauthorized copying and distribution is a violation of law.
Refrigerator
SERVICE MANUAL
MODEL: AFD626TGW
AFD626TGB
AFD626TGR
AFD626TGW/F
AFD626TGB/F
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 potent ial dangers in attem pting to service a product.
Product powered by electricity should by serviced or repaired only by experienced prof essional 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
Haier Group
SERVICE MANUAL
Model:AFD626TGW/R/B
2
Issue 2010-10-25
Rev. Ref1010S025V0
Contents
Table of Contents ········································································································ 2
1. General Information ································································································ 4
1-1. General guideline ····························································································· 4
1-2. Insurance test ··································································································· 4
1-3. How to read this service manual ······································································· 5
2. Product Feature ······································································································ 6
2-1. Specifications ··································································································· 6
2-2. Main functions and features ·············································································· 8
2-3. External views ·································································································· 9
2-4. Product dimensions ························································································ 10
3.
Disassembly ·········································································································· 11
3-1. Remove the variable temperature compartment drawer ·································· 11
3-2. Remove the display panel ··············································································· 11
3-3. Remove the rolling shelf ················································································· 11
3-4. Remove the air-duct························································································ 12
3-4-1. Removal of fri dge air-duct ········································································ 12
3-4-2. Removal of freezing air-duct ···································································· 12
4. Control and Display System ············ ····························· ······························ ·············· 14
4-1. Control and display panel ··············································································· 14
4-2. Error code display and sensor positions ························································· 18
4-2-1. Error code display ···················································································· 18
4-2-2. Graphic display of the sensor location ······················································ 19
4-3. TEST MODE ··································································································· 20
5. Control Principle of Electronic Component ·························································· 22
5-1. Air damper ······································································································ 22
5-2. Control principle of the freezer fan motor ························································ 22
5-3. Control principle of the fridge fan motor ·························································· 22
5-4. Defrosting control principle·············································································· 22
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6. System Flow Principle ···························································································· 23
6-1. Refrigeration flow chart ·················································································· 23
6-2. Perspective of the refrigeration system ·························································· 23
6-3. Air flow scenograph ······················································································· 25
7. Circuit Diagram ······································································································· 26
7-1. Main control PCB diagram ············································································· 26
7-2. Main control PCB connections ······································································· 27
8. Trouble Shooting ···································································································· 29
8-1. Common problems and solutions ·································································· 29
8-1-1. No defrosting ·························································································· 29
8-1-2. Neither display nor start when powering on ············································ 29
8-1-3. Poor freezing effect accompanied by loud noise ····································· 29
8-2. Examination and solutions for other problems ··············································· 30
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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 befor e t he r epair to avoid an electrical sh ock hazard.
3. In the case of a live-line test, insul at ing gloves should be worn to avoid pot ential electrical shock.
4. Confirm the rated current, voltage and capacity before testing with any kinds o f instr uments.
5. Watch if the upper door is open when you check so mething at a lower position.
6. Take out every part in the cabinet before moving the mac hine, 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 220V with a frequency of 50Hz.
10. A big fluctuation of voltage (exceed t he range 187～230V) 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. In this condition an automatic voltage reg ulator over 750W should be added.
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 inflamma ble gases like carbon monoxide, open the door and win dows. Don’t
pull out or insert the plugs of the appliance.
13. Don’t touch the refrigeration surface of the freezing compar t m ent when the refrigerator is in op eration,
especially when your hand is wet, else you 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 t o prev ent da mag e t o the co mpr essor c aus ed by cont inuo us restart.
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Photo used in this ma n ual
The illustration and photos used in this Manual may not base on the final design of products, which
may differ from your products in some way.
1-3. How to read this service manual
1-3-1. Using Icons
The meaning of each icon is described in the table below:
Note:
A “note” provides information that is not indispensable, but may nevertheless be valuable to the
reader, such as tips and tricks.
Caution:
A “caution” is used when there is danger, 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 other places in this binder or in this manual, where we will find additional
information on a specific topic.
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Chapter 2 Product Feature
2-1. Specifications
1
Models
AFD626TGW
AFD626TGW/F
AFD626TGB
AFD626TGB/F
AFD626TGR
AFD626TGR/F
Sketch
Product description (Refrigerator/Freezer)
Refrigerator
Type of appliance (FS= freestanding/BI= built-in)
FS FS FS
Type of cooling system(NF=no frost/ S=static)
NF NF NF
Climate class*
SN N ST SN N ST SN N ST
Freezer compartment / Star rating
4* 4* 4*
2
Key features
Gross capacity
L 298 298 298
Total net capacity
L 254 254 254
Net capacity refrigerator compartment
L 160 160 160
Net muti-use compartment
L 34 34 34
Net capacity freezer compartment /
ice compartment
L 60 60 60
Freezing capacity
kg 12kg 12kg 12kg
Energy consumption / year
kWh 259 259 259
Max storage time at breakdown Freezer
Min 820
820 820
Defrosting (M=manual A=automatic)
A A A
Frost free system
yes yes yes
Defrost water outlet
yes yes yes
Air circulating ventilator
yes yes yes
Kind of coolant (R134a/R600a)
R600a/ 68g R600a/ 68g R600a/ 68g
3
Technical data
Voltage / frequency
V/Hz 220-240~/ 50 220-240~/ 50 220-240~/ 50
Input power / mains fuse minimum
W /A 100/ (DC) 100/ (DC) 100/ (DC)
Temperature range (from>to)
°C
Refrigerator
2-10°C 2-10°C 2-10°C
Muti-use compartment
5~-18°C 5~-18°C 5~-18°C -
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Vegetable Crisper
2-10°C 2-10°C 2-10°C
Freezer
-16 ~-26°C -16 ~-26°C -16 ~-26°C
Features:
Energy consumption per l 100 net / year
kWh 102 102 102
Energy consumption per l 100 net / 24h
kWh 0.28 0.28 0.28
Cooling system: K=Compressor / A=Absorption
K K K
Max noise level
dB(A
)
42 42 42
4
Aesthetics
Colors: W=white G=silver gray
B=Obsidian SS=stai n l ess steel
W BLACK RED
Fascia panel / Handle (w / c)
G/G G/G G/G
F= flat / R= rounded / S= streamline
R R R
Inside colour
w w w
Compartments number
n° 3 3 3
Bottle compartment
n° 4 4 4
Hinged (r =right l =left) / reversible
r / X r / X r / X
Shelves:
Number Fridge / Freezer
3 / - 3 / - 3 / -
Type (gr=grill / g=glass / p=plastic)
g g g
Color w-white / b=blue / t=transparent.
t t t
Adjustable (Y=yes / N=not)
N N N
Foldable Shelf
yes yes yes
Bottle Rack
yes yes yes
Drawers:
Plastic drawers (fully freezing comp.)
n°. 3 3 3
Muti-use comp
n°. 2 2 2
Colour of drawer (w=white/t=transp./g=green)
t t t
Crisper:
Chiller / Meat (salad crisper) transparent / white
Chiller (t) Chiller (t) Chiller (t)
Vegetable crisper(s) transparent / white
t t t
5
Equipment & accessories
Control panel
Interior / exterior
Exterior Exterior Exterior
Thermometer interior / exterior
Interior Interior Interior
Display type
LCD LCD LCD
Control lamps green / yellow /white
W W W
Over temperature alarm LED / acoustic
acoustic acoustic acoustic
Adjustable thermostat
yes yes yes
Fast freeze switch /-function
yes yes yes
Deodorizing
yes yes yes
Interior light
W yes yes yes
LED light
n° Full Full Full
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Freeze pack(s)
n° 3 3 3
ice maker Manual/ Automatic
M M M
Ice cube tray(s)
n° 1 1 1
Butter holder
yes yes yes
Egg trays
2 2 2
Adjustable feet front / rear
n° 2 / - 2 / - 2 / -
Length of cable/incl. plug
cm 200 200 200
Condenser Back wall / Integrated
I I I
6
Product dimensions
Unit dimensions ( H / W / D)
cm 180/63/64 180/63/64 180/63/64
Depth Without handle
cm 64 64 64
Depth with open door
cm 119 119 119
Door open angle
n° <135 <135 <135
Net weight
kg 78 78 78
7
Packing dimensions & load ability
Packing dimensions (H / W / D)
cm 185.5/74.7/71.4 185.5/74.7/71.4 185.5/74.7/71.4
Gross weight
kg 92 92 92
40 ' Container load
pcs 54 54 54
40 ' HC Container load
pcs 72 72 72
8
Recycling symbols
Packing materials / Recycling symbols (RS)
RS RS RS RS
Carton weight in gr
6270 6270 6270
Polystyrene weight in gr
06 2570 2570 2570
Polyethylene foil weight in gr
04 210 210 210
9
Service
Users instruction (languages)
D / F / I / GB / E / P / NL
2-2. Main functions and features
◆ Full-frequency technology.
◆ Artificial intelligent automatic regulation of the temperature.
◆ Over-temperature alarm.
◆ Full temperature range of the variable temperature compartment
◆ LCD display.
◆ Holiday function.
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2-3. External views
Refrigerator structure
Fridge storage compartment
LED light
Shelf
Rolling Shelf
Shelf
Fruit and vegetable drawer
Drawer in variable
temperature compartment
Freezing drawer
Power plug
Cover for medium bottle rac
Rack for medium bottles
Sealing box
Rack for small bottles
Rack for big bottles
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2-4. Product dimensions
Refrigerator Dimensions:
Refrigerator height H=18 05mm
Refrigerator width W=630mm
Refrigerator depth D=640mm
Cabinet depth D1=560mm
Door depth D2=70mm
D
W
H
D1
D2
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Chapter 3 Disassembly
3-1. Remove the variable temperature compartment drawer
(1) Open the variable temperature compart me nt door (fig. ①);
(2) Remove 4 connectors of the drawer (fig. ②);
(3) Pull out 2 drawers from the cabinet (fig. ③).
3-2. Remove the display panel
① ② ③
④ ⑤
(1) Detach 2 screws fixing on the top cover of the fridge door (fig. ①);
(2) Remove the top cover of the fridge door (fig. ②);
(3) Detach 2 screws fixing on the display panel box (fig. ③);
(4) Pull out the shelf of display panel and disconnect the connector of the d isplay panel (fig. ④).
(5) Detach 2 screws fixing on the display panel shelf (fig. ⑤)
3-3. Remove the rolling shelf
① ②
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(1) slide in the rolling shelf (fig. ①);
(2) Detach 2 screws of the rolling shelf (fig. ②);
3-4. Remove the air-duct
Unplug the refrigerator before r emoving the air-duct
3-4-1. Removal of fridge air-duct
(1) Tak e out the accessories in the fridge storage compartment which may interfere with the removal
of the air-duct (including shelves, Fruit and vegetable drawer).Tilt 2 l am p covers in the lower of the
air-duct (fig. ①);
(2) Detach the duct cover in the upper part of the air-duct and detach 4 screws in the upper and lower
part of the air-duct (fig. ②);
(3) Tilt the refrigeration air-duct forward entirely around its upper side until you can see the connector
on its upper side. Pul l out t he connector and you can remove the r efri ger ation air-duct (fig. ③);
3-4-2. Removal of freezing air-duct
① ② ③ ④
⑤ ⑥ ⑦ ⑧
(1) Take out drawers in the variable temperature compartment and freezer storage compartment
①
②
③
Lamp cover
Duct cover
Lamp connector
connector
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which may interfere with the removal of the freezing air-duct .
(2) detach 4 screws in lower of the middl e clapboard (fig ①);
(3) Disconnect the connector of the middle clapboard(fig ②);
(4) Remove the middle clapboard from the lower ; (fig ③);
(5) Detach the screw of the duct cov er and remove it. (fig ④);
(6) Pull out the connectors and disconnect them (fig ⑤);
(7) Remove 4 small duct cover and detach 4 screws in the freezing air-duct onto the freezer
chamber (fig ⑥);
(8) Tilt the freezing air-duct forward from top to bottom and disconnect the connectors of the
freezing air duct ,then you can r emove the air-duct (fig ⑦);
(9) Take out the freezing air-duct and t he f in ev aporator is just behind it (fig ⑧).
When reinstalling, please connect the connector first and then mount and fix the freezing
air-duct.
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Chapter 4 Control and display system
4-1. Control and display panel
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■Automatic temperature regulation of the refrigerator
●When the power is initially switched on, the refrigerator is in a rtificial intelli gence mode (symbol I),
the refrigerator will automatically regulate the temperature in the refrigerator compartments according
to the ambient temperature.
●When the refrigerator is in the Unlock mode, pressing button D Function, and symbol I Artificial
Intelligence is selected, the I symbol starts to flash. Press button E Setting to start the artificial
intelligence mode, the symbol I is permanently displayed, indicating the artificial intelligence mode is
operating. To stop the artificia l intelligen ce mode pr ess but ton E Set ting an d the symbol I w ill disap pear
indicating that the artificial int el li gence mode has now stopped.
■Lock / Unlock
If symbol N is displayed, the pan el i s locked. Press and hold button E Settin g for 3 seconds, symbol N
shall disappear, and the panel is unlocked. Hold button E Setting again for 3 seconds, symbol N is
displayed and the pane l is loc ke d again.
■Holiday function
In the unlocked mode pressing button D and selecting symbol M Holiday the symbol M will start to
flash, press button E, symbol M will be permanent displayed indicating the holiday mode is operating.
The fridge compart me nt will warm up to +17℃.
CAUTION: Remove any food and drink from the fridge compartment that may spoil due to the
compartment being warm.
To cancel the holiday mode press button D select symbol M and press button E. Symbol M will
disappear and the holiday mod e stops.
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■Regulation of fridge compartment temperature between 2℃ and 10℃ and
ON/OFF control, when in unlocked mode.
●Pressing button A t o adjust the temperature and s ymbol F will start flashing.
●Each press of button A, t he t em per at ur e shall be increased by 1℃ and recy cled between 2℃~10℃
-OF. When it is set to be at OF shift, the refrigerating chamber shall be closed while at other shifts, it
shall be started.
●Each press of button A, the temperature selection will increased by 1℃ between OFF and 2℃ to
10℃. At the OFF selection the fridge compartme nt will be at ambient temperatur e.
WARNING! The fridge compartment should not be set at a higher(warmer) temperature than 5℃ to
keep bacteria growth to a minimum. The recommended temperature is 1℃ to 4℃.
■Regulation of variable temperature compartment between +5℃ and -18℃ and
ON/OFF control, when in unlocked mode.
●Pressing button B to adjust t he t emp er at ur e and symbol G will start flashing.
●Each press of button B, the temperature selection will increase by 1℃ between OFF and +5℃ to
-18℃. At the OFF selection the variable t em per at ure compartment will be at ambient temperature.
●After the temperature is set, the system shall automatically confirm and save the temperature if no
button operation is performed within 5 seconds; the symbol shall stop flashing, and the display shall
return to the actual temperature. When the var iable temperature cha m ber has attained it s r efrigerating
effect, the set temperat ur e shall be displayed.
■Regulation of freezer compartment temperature between -16℃ and -26℃ when
in unlocked mode.
●Pressing button C to adj ust t he t emp er ature and symbol H will start f lashing.
●Each press of button C the tem per at ur e will decrease by 1℃ between -16℃ to -26℃.
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●After the temperature is set, the system shall automatically confirm and save the temperature if no
button operation is performed within 5 seconds; the symbol shall stop flashing, and the display shall
return to the actual temperature. When the freezing compartment has attained its refrigerating effect,
the set temperature shall be dis played.
■Rapid freezing
●The function of rapid freezing is designed for preservation of the nutrition of frozen foods, which
shall help freeze foods through in the shortest loss of time. If a large amount of foods is frozen once,
the rapid freezing function shall be started 24 hours in advance to reduce the temperature of the
freezing compartment before the foods are put in.
●Under unlock state, by press butt on D Function Select ion, symbo l K Rapid Freezing can be se lected
and symbol K begins flashing, press button E Setting, symbol K shall be displayed and stop flashing,
indicating the rapid freezin g fun ction of the freezing chamber is started.
After 56 hours, it shall stop the rapid freezing state.
Under rapid freezing, press button D, select symbol K, and press button E, and symbol K will
disappear, indicating that the rapid fre ezing function has stopped.
■Rapid chill
Under unlock mode, by pressing button D Function Selection, symbol J Rapid chill can be selected
and symbol J begins to flash, and press button E Setting, symbol J shall be displayed and stop
flashing, indicating the rap id ch il l function of the variable temperature chamber is started.
Under such a state, the v ariab le te mperat ure c ham ber sha ll be o perated acc ordin g to the set s hif t, an d
its temperature s hall be gr adually chang ed t o -18℃ or aft er 3 h ours of r apid ch ill, it shal l sto p the r api d
chill. Under rapid chill, press but ton D, select sy mbol J and pr ess button E, and symbol J will disap pear,
indicating that the rapid chill fu nct ion has stopped.
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■Display control
The display screen will turn off automatically 30 seconds after an operation is finished. It will be lit up
by opening the refrigerato r door or pr essing any key.
■Door open alarming
When the fridge door is open for more t han 1 minut e, the buz z er w ill sound 3 b eep s ev ery 30 sec ond s.
The buzzer can be silence d by closing the door.
■Over temperature alarm for the freezer storage compartment
When the temperature of the freezer storage compartment is more than -3℃, the temperature of the
freezer storage comp ar t m ent t hat displayed on the display panel w i ll flashing.
4-2. Error code display and sensor posi t ions
4-2-1. Error code display
Malfunction des cr iption Sign Display Display position
Malfunction of the fridge evaporator sensor RE SNR F1 D ispl a y panel
Malfunction of the ambient temperature sensor AT SNR F2 Display panel
Malfunction of the fridge storage temperature
sensor
R SNR F3 Display panel
Malfunction of the freezer storage temperature
sensor
F SNR F4 D ispl a y panel
Malfunction of the variable temperature
compartment sensor
C SNR F5 Display panel
Malfunction of the defrosting temperature sensor D SNR F6 Displ a y panel
Malfunction of the defrosting / Ed Display panel
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4-2-2. Graphic display of the sensor location
Freezer Compartme nt :
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4-3. TEST MODE
MODE OPERATION WORKING CONDITION REMARKS
TEST1
In the Unlock mode, press and
hold button A+B+C on the door
display panel at the same time
for 3 seconds to enter the T1
MODE, the door display panel
displays T1 T1 T1, and the
refrigerator enters Forced
Refrigeration Mode
1) The compressor and the fans
shall do a high speed oper ation;
2) The damper is open;
3) The defrosting heater wire is
disconnected.
This can be used to
test the refrigeration
performance.
TEST2
In the T1 MODE, press and hold
the button A+B+C on the door
display panel at the same time
for 3 seconds to enter the T2
MODE, the door display panel
displays T2 T2 T2, and the
refrigerator enters Forced
Defrosting Mode
1) The compressor and the fans
and the damper are close d;
2) The defrosting heater is
forced operated.
This can be used to
test the defrosting
system
TEST3
In the T2 MODE, press and hold
the button A+B+C on the door
display panel at the same time
for 3 seconds to enter the T3
MODE, the door display panel
displays T3 T3 T3, and the
clapboard heater and the cover
board heater enter Forced
Heating Mode
1) The compressor and the fans
and the damper and the
defrosting heater are closed,
2) The clapboard heater and the
cover board heater are forced
operated.
This can be used to
test the clapboard
heater and the cover
board heater.
TEST4 In the T3 MO DE, press and hold 1) The compressor and the /
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the button A+B+C on the door
display panel at the same time
for 3 seconds to enter the T4
MODE, the door display panel
displays T4 T4 T4, and the
refrigerator enters a Special
Mode
freezer fan motor shall be forced
operated,
2) The damper is open,
3) The defrosting he at er w ire is
disconnected,
4) The fridge compartment
operates normally.
EXIT
In the T4 MODE, press and hold
the button A+B+C on the door
display panel at the same time
for 3 seconds to Exit TEST
MODE
The door display panel will
resume normal display
/
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Chapter 5 Control principle of electronic component
5-1. Air damper
(1) The damper is controlled with the Variable temperature compartment sensor C SNR.
(2) The damper is closed from the beginning of defrosting until at least 8 minutes after the
defrosting is finished.
(3) Upon initial powering on or resetting of t he control p anel, the damper conducts a clos e-and-open
cycle before acting according t o t he control conditions in item (1).
(4) The damper will be forced to conduct an open-and-close cycle if it has been closed for 1 hour.
After that, its closing/opening will be controll ed by C SNR.
(5) If the temperature is still rising (or dropping) within 10 minutes after opening (or closing) of the
air door, it w il l open (or close) once again.
5-2. Control principle of the freezer fan motor
The freezer fan motor is controlled by the control panel according to the following conditions. The DC
fan’s rotation speed is regulated with the input Voltage and the AC fan operates directly.
(1) ON/OFF condition of the freezer fan motor is controlled with the Freezer storage temperature
sensor F SNR;
(2) ON/OFF condition of the freezer fan motor is same with the Compressor.
5-3. Control principle of the fridge fan motor
The fridge fan motor is controlled by the control panel according to the following conditions. The DC
fan’s rotation speed is regulated with the input Voltage and the AC fan operates directly.
(1) ON/OFF condition of the fridge fan motor is controlled with the Fridge storage temperature sensor
R SNR.
(2) When the Fridge storage compartment door is open, the fridge fan motor will not run.
5-4. Defrosting control principle
(1) A defrosting cycle will be started once the compressor has operated for 12-18 hours
accumulatively. It will stop defrosting when the defrosting sensor detects a temperature over
10ºC.
(2) The damper and the freezer fan motor is closed, the com pr essor stops during defrosting.
(3) After initial powering on or resetting of the control panel, it will start the first defrosting cycle after
the compressor has operat ed for 5 hours accumulatively .
(4) It may enter the defrosting state when the defrosting sensor is malfunctiony (short-circuit or
open-circuit). In this case, it w ill exit t he defrosting state after 30 minutes.
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Chapter 6 System flow principle
6-1. Refrigeration flow chart
Principle diagram and des cr iption of the refrigeration cycle
The refrigerant is compressed in the compressor, from there, it enters the condenser, the de-dewing
tube, and the dry filter, and goes into the valve, from there,it enters fridge and freeze evaporator after
being throttled and decompressed in the capillary tube. Finally, it returns to the compressor through
the air return tube.
Principle diagram of the refrigeration cycle:
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6.2. Perspective of the refrigeration system
1.compressor 2.evaporator tube 3.condenser4.de-dewing tube 5.dry filter 6.valve
7.fridge capillary tube 8.fridge evaporator 9.freeze capillary tube 10.freeze evaporator
11.air return tube 12.air return connect tube
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6.3 Air Flow Chart
Schematic drawing and descr i pt ion of air circulation in the refrigerator air-duct
Fridge compartment
air flow chart
Freezer compartment
air flow chart
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Chapter 7 Circui t diagram
7-1. Main control PCB diagram
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7-2. Main control PC B connections
There are 5 connectors on t he m ain c ont r ol panel.
CN1 is the connector for the sensors and the PWM. Its pins are:
1: GND;
2-4: Null;
5: Pin5 and pin1 connect to the variable temperature compartment sensor. We can test the sensor
with these two wires. Its resistance in normal operation is between 10.9 and 25.19kΩ (correspond
to -10℃～-25℃). The resistance at normal temperature is between 2.49 and 1.61kΩ (correspond
to 20℃～30℃);
6:
Pin6 and pin1 con nect to the fridge evaporator sensor . We can test the sensor w ith these two w ires.
Its resistance in normal operation is between 6.35 and 3.88kΩ (correspond to 0℃～10℃). The
resistance at normal temperature is between 2.45 and 1.58kΩ (correspond to 20℃～30℃);
7: GND;
8:
Pin8 and pin7 connect to the fridge storage sensor. Resistance test is the same as the fridge
evaporator sensor;
9: Pin9 and pin7 connect to the defrosting sensor. Resistance test is the same as the variable
temperature compartment sensor;
10: GND;
11: Pin11 and pin10 connect to the freezer sensor. Resistance test is the same as the variable
temperature compartment sensor;
12: PWM;
CN2 is the connector for display panel, the door switch, the LED lights and ambient temperature
sensor. Its pins are:
1: GND；
2: +5V；
3: Com-in；
4: Com-out；
5: Door switch signal；When the door is opened, GND and the signal wires are switch to conduction.
When the door is closed, the wires are disconnected;
6：Pin6 and pin1 connect to t he ambient temperatur e sensor. Resistance test is t he same a s the fridge
evaporator sensor;
7: LED lights +12V；
8: LED lights GND；
CN3 is the connector for the freezer fan motor and the damper. Its pins are:
1: Null;
2: Freezer fan motor GND;
3: Freezer fan motor +15V(MAX);
4-6: Null;
7-10: Damper motor;
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CN4 is the connector for the power ca bl e and heaters and valve. I ts pins are:
1: N;
2: L;
3: Null;
4: Defrosting heater. The resistance between it and the N is 345Ω±10%;
5: Valve;
6: Clapboard heater and c over board heater. The resistance between it and the N is 4033Ω±10%;
CN5 is the connector for the fridge fan motor. Its pins are:
1-2: Null;
3: Fridge fan motor GND;
4: Fridge fan motor +15V(MAX).
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Chapter 8 Trouble shooting
8-1. Common problems and solutions
8-1-1 Symptom: no defrosting
Check:
1) Remove the freezer fan cover plate to check if all the connectors are connected properly and test if
there is 220V voltage output across the terminals of the heati ng wire.
2) Measure the resistance of the heating wire with a multim et er. It should be 345Ω around.
3) Measure the resistance of the defrosting fuses. If they’re zero, the fuses are OK. If they’re infinite,
the fuses are malfunctioning.
4) If no malfunction is found in the above checks, please test the defrost i ng t emperature sensor with a
multimeter.
8-1-2 Symptom: neither displaying nor starting when powering on
Check:
1) Check if the power supply is connected properly.
2) Remove the main control panel and examine its back side carefully to see if there are solder skips
or open soldering;
3) Check if the connector of the fr eezer door hinge is connected properly.
Solutions:
1) If there is dry soldering or open so ld er ing on the control panel, resolder it with an electrical iron.
2) If any connector is not connected pr operly, replug it firmly.
8-1-3 Symptom: poor freezing effect accompanied by loud noise
Check:
1) Check if there is apparent abnormal sound in the freezer storage compartment. Remove the fan
cover plate, please first elim inate t he possibility of improper installation.
2) If the freezer fan does not run, remove it and check if its connector are connected properly. Test if
there is approximately 11VDC voltage across pin2 and pin 3 of CN3. If there is no 11VDC voltage,
the main control panel c an genera lly be deter m ined t o be malfu ncti oning. If the re is 11VDC voltage,
the freezer fan can generally be det ermined to be malfunctioning.
3) If the fan rotates abnormally, the fan is malfunctioning.
Solutions:
（1）If there is apparent abnormal sound in the freezer storage compartment, check if the fan base is
firmly fixed, if the fan vanes are installed properly, and if they intervene with the wires. If any of these
problems is found, please r em ove the fan and reinstall it properly.
（2）If the fan connector is not inst alle d properly, disconnect the terminals and reinsta ll the connect or.
（3）If the main control panel or the fan is malfunctioning, replace the malfunctioning one with a good
spare part.
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8-2 Examination and solutions for other problems
Problems
Causes
Solutions
Water/moisture/frost in the refrigerator
Moisture accumulates
on the refrigerators
inner walls
Hot and moist climate.
The door is not closed
tightly
The door is opened too
frequently or for too long
time
Accumulation of frost and moisture
accelerate in such climate.
Make sure the refrigerator is level and there
is no food or container inter fering with the
door
Do not open the door so frequently
Water/moisture/frost on outside surface of the refrigerator
Moisture accumulates
on the refrigerator’s
outside surface or
between two doors
Damp climate
The refrigerator door is
not closed tightly. This
causes mixing of the cold
air in the refrigerator with
the warm air outside it
It is normal in dam p climate. The moisture
will decrease when the humidity drops.
Make sure the refrigerator is level and there
is no food or container inter fering with the
door
Refrigerator operation
The compressor does
not work
The refrigerator is in
defrosting cycle.
The refrigerator is not
plugged into a power
outlet.
It is normal for an automatic defrosting
refrigerator.
Verify the plug is plugged in the socket
firmly.
The fridge storage
compartment does not
work
The air door cable is not
connected properly.
The fan does not work
The fridge storage
compartment is turned
off
Check if the air d oor c a bl e i s not connected
properly and install it correctly if not so.
Verify that the air door acts normally with
the Fridge ON/OFF key on the display
panel
The fan does not work while the
refrigeration air door is open. Pleas e check
if the door on-off behind the front decoration
strip is installed properly. Reinstall it
correctly if not so.
Turn on the fridge storage compartment
manually
The refrigerator runs
frequently or runs for
too long period
The indoor or outdoor
temperature is high
The refrigerator has been
powered off for a period
of time.
The door is opened too
frequently or for long
periods.
The door of the fridge /
freezer storage
compartment is not
tightly closed.
The temperature setting
for the freezer storage
compartment is too low
The door gasket of the
fridge/freezer storage
compartment is dirty,
worn, cracked or
mismatched.
In this case, it is norm al for the refrigerator
to run longer.
Normally, it takes 8 to 12 hours for the
refrigerator to totally cool down.
Warm air enters the refrigerator and causes
it to start frequently. Please do not open the
door so frequently.
Make sure the refrigerator is level place and
there is no food or c ontai ne r inter f erin g w ith
the door.
Set the temperature higher until satisfactory
refrigerator temperature is obtained. It takes
24 hours for the refriger ator temperat ure to
become stable.
Clean or replace the door gasket. Leakage
gap of door gasket can cause longer
running time of the refrigerator in order to
maintain desired temperature.
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Too high temperature
Too high temperature
in the fridge/freezer
storage compartment
The door is opened too
frequently or for too long
periods of time
Temperature is set too
high
The door is not closed
tightly
Warm air will enter the refrigerator
whenever the door is o pened. Try to open
the door as infrequently as possible.
Reset the temperature.
Make sure the refrigerator is on a level
surface and there is no food or container
interfering with the door.
The temperature in the
freezer storage
compartment is too
high while the
temperature in the
fridge storage
compartment is OK
The temperature is set
too high
Set the freezer temper ature lower. It takes
24 hours for the temperature of the
refrigerator to become stable.
The temperature in the
fridge storage
compartment is too
high while the
temperature in the
freezer storage
compartment is OK
The temperature is set
too high
Set the fridge temperature lower. It takes 24
hours for the temper atur e o f the r ef riger at or
to become stable.
Bad odors in the refrigerator
The inside of the
refrigerator is dirty
The inside of the
refrigerator needs
cleaning
Food with strong odor is
stored in the refrigerator
Clean the internal of the refrigerator
Wrap the food tightly.
If you hear...
Beeps The fridge storage
compartment door is
open
The temperature in the
freezer storage
compartment is too high
Close the door or silence the alarm
manually
The alarm is normal when it is f irst started
due to relatively higher temperature.
Abnormal sound The refrigerator is not
located on a level
surface
The refrigerator touches
some object around it
Adjust the feet to level the refrigerator.
Remove objects around it.
Slight sound similar to
that of flowing water
It is the sound of the
refrigerating system
Normal.
Heating of cabinet The de-dew tube is
de-dewing
It is a process to prevent dewing. It is a
normal phenomenon.
Sincere forever
Haier Group
Haier Industrial Park, No.1, Haier Road
266101, Qingdao, China
http://www.haier.com
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