Hisense HRF266N6CSE User manual

Model:
HRF266N6CSE
Refrigerator Service Manual
WARNING:
This service information is designed to be used ONLY by
experienced repair technicians and is not designed for use by
the general public. It does not include Warnings and Cautions
to advise non-technical individuals of potential dangers
in attempting to service a product. Products powered by
electricity and/or use gas refrigerant should be serviced or
repaired only by experienced professional technicians. Any
attempt to service or repair the product or products covered
in this service manual by anyone without this knowledge and
experience could result in serious injury or death.

2
Table of Contents
SAFETY .....................................................................................................................................................................3
MODEL SPECIFICATIONS .......................................................................................................................................4
PARTS IDENTIFICATION.........................................................................................................................................5
Refrigerator Parts .......................................................................................................................................................................... 5
Door Removal .................................................................................................................................................................................6
Air Flow Path .................................................................................................................................................................................. 8
Evaporator Structure ...................................................................................................................................................................9
Compressor Compartment Structure ................................................................................................................................ 10
OPERATION ............................................................................................................................................................ 11
Display Controls ............................................................................................................................................................................11
Water and Ice ...............................................................................................................................................................................13
Door Leveling and Alignment ................................................................................................................................................. 14
Defrost Mode .................................................................................................................................................................................15
DIAGNOSTIC PROCESS ........................................................................................................................................ 16
Error Code Summary ..................................................................................................................................................................16
Environment or Humidity Sensor Error ..............................................................................................................................17
Other Sensor Errors .....................................................................................................................................................................19
Ice Maker Error (Eb) .................................................................................................................................................................. 20
Communication Error (Ec or Er) ........................................................................................................................................... 21
Fan Error (F1) ................................................................................................................................................................................22
Flow Sensor Error........................................................................................................................................................................23
Basic Troubleshooting ...............................................................................................................................................................24
Start Fault .......................................................................................................................................................................................26
Freezer Compartment Cooling ..............................................................................................................................................27
Refrigerator Compartment Cooling .....................................................................................................................................28
Thick Frost in Freezer Compartment ..................................................................................................................................29
Moisture in Refrigerator Compartment ..............................................................................................................................29
Light Function ............................................................................................................................................................................. 30
Noise ............................................................................................................................................................................................... 30
DIAGNOSTIC AND REPAIR PROCEDURES ........................................................................................................ 31
Wiring Diagram .............................................................................................................................................................................31
Mainboard ......................................................................................................................................................................................32
Compressor ...................................................................................................................................................................................32
Compressor Inverter Board .....................................................................................................................................................33
Fan Motor ...................................................................................................................................................................................... 34
Refrigerator Air Channel .......................................................................................................................................................... 36
Interior Lights ...............................................................................................................................................................................38
Freezer Door Switch ................................................................................................................................................................. 39
Defrost Heater ............................................................................................................................................................................. 40
Control Panel ...............................................................................................................................................................................41
Reed Switch and Reed Switch Magnet .............................................................................................................................. 42
Water System ............................................................................................................................................................................... 43
Water Lines ................................................................................................................................................................................... 45
Ice Maker .........................................................................................................................................................................................47
LokRing Connection Points .................................................................................................................................................... 49

3
1. Safety
Please read the following safety information before servicing this refrigerator.
General Service Precautions
• Disconnect power before handling any electrical components.
• Check the rated current, voltage, and capacity.
• Do NOT allow water to get near any electrical components.
• Use exact replacement parts.
• Remove any objects from the top of the cabinet before tilting the refrigerator.
Important Safety Instructions
WARNING: To reduce the risk of fire, electrical shock, injury to persons, or damage when using the
refrigerator, follow basic precautions, including the following:
• Plug into a grounded 3 prong outlet.
• Do not remove ground prong.
• Do not use an adapter.
• Do not use an extension cord.
• Disconnect power before servicing.
• Disconnect power and wait a minimum of
3 minutes before replacing PCB parts.
• Wait a minimum of 5 minutes after unplugging
power cord from electrical outlet before
plugging the cord back into the electrical
outlet.
• Make sure the electrical outlet is properly
grounded, particularly in wet or damp
locations.
• Replace all parts and panels before operating.
• Flammable refrigerant used. To be repaired
only by trained service personnel. Do not
puncture refrigerant tubing.
• Flammable refrigerant used. Dispose of
properly in accordance with federal or local
regulations.
• Flammable refrigerant used. Follow
handling instructions carefully. Risk of fire
or explosion due to puncture of refrigerant
tubing.
• Flammable refrigerant used. Do not use a
torch when servicing the refrigerator.
• Use nonflammable cleaner.
• Keep flammable materials and vapors, such
as gasoline, away from refrigerator.
• Use two or more people to move and install
refrigerator.
• If your refrigerator is not being used,
remove the doors. This will reduce the
possibility of danger to children.
Read and Save These Instructions
WARNING:
This service information is designed to be used ONLY by experienced repair technicians and is not
designed for use by the general public. It does not include Warnings and Cautions to advise non-
technical individuals of potential dangers in attempting to service a product. Products powered by
electricity and/or use gas refrigerant should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products covered in this service manual by
anyone without this knowledge and experience could result in serious injury or death.

4
2. Model Specifications
SPECIFICATIONSPECIFICATION VALUEVALUE
Design Pressure Below
High Side/Low Side 250 PSIG / 88 PSIG
Refrigerant/Amount R600a/62G
Rated Voltage 115V
Rated Frequency 60Hz
Rated Current 2.8A
Defrost Heater 220W
Foaming Agent Cyclopentane
Net Weight 273 lbs
W x D x H (with hinges) 36" X 33.6" X 69.9"
W x D x H (without hinges) 36" X 28.75" X 68.5"

5
3. Parts Identification
Refrigerator Parts
a Door bins
b Vertical baffle
c Water dispenser (inside)
d Crisper drawers
e Full width pantry drawer
f Freezer LED light
g Ice maker (inside)
h Ice bin (inside)
i Lower freezer drawer
j Adjustable bottom feet
k Top cover
l Control panel
m Vertical baffle guide
n Water filter
o Refrigerator LED light
(inside)
p Air channel
q Glass shelf
r Crisper cover
s Upper freezer drawer
t Lower drawer partition
(inside)
u Roller
v Refrigerator door
w Freezer door
x Handles
a
b
c
d
e
f
g
h
i
j
o
p
q
r
s
t
u
k l m n
x
v
w

6
Door Removal
(only if needed)
Measure the refrigerator to make sure it will fit
through the doorway. If the refrigerator cannot
pass easily through the doorway, follow the
instructions to remove the two refrigerator
compartment doors and the front panel of the
freezer drawer.
WARNING
Electrical Shock Hazard
Disconnect power before removing doors.
Reconnect ground wire before operating.
Failure to do so could result in death or electric
shock.
Tools needed
• Phillips Screwdriver
• 4 mm Hex-key wrench
• 8 mm Socket wrench
Remove the Doors
IMPORTANT: Keep the refrigerator doors closed
until you are ready to lift them from the cabinet.
1. Unplug refrigerator or disconnect power.
2. Using a Phillips screwdriver, remove the three
screws attaching the hinge cover and control
panel to the top of the cabinet.
Fridge Super
Cool
Energy
Saving
Freezer
°F/°C
(3s)
Ice
On/Off
Super
Freeze
a b
a Screws
b Hinge cover
3. Gently lift the hinge cover, keeping the wire
harness attached, and move the cover/wire
harness assembly behind the door hinges on
the cabinet top.
4. Disconnect the wiring harness by pressing the
release catch on the wire harness connector,
and then pulling the ends apart (left-hand
hinge only).
a
a Wiring harness
5. Using an 8 mm socket wrench, remove the
three screws fastening the top hinge to the
cabinet, and then remove the ground screw
(left-hand hinge only).
a
b
a Screws
b Ground screw
NOTE: Provide additional support for the
door while the hinge is being removed. Do not
depend on the door gasket magnets to hold
the door in place while you are working.
6. Remove the top door hinge.
IMPORTANT: For the door to close properly
in the future, DO NOT lift the door from the
bottom hinge if it is open to an angle narrower
than a 90° angle.
7. Open the door to a 90° or wider angle.
90°

7
8. Using both hands, lift the door off the bottom
hinge and set it onto a soft surface to protect
the finish.
9. If necessary, use a hex-key wrench to remove
the two bolts fastening the bottom hinge to
the front of the cabinet, and then remove the
hinge.
10. Repeat this procedure to remove the other
door.
Remove the Front of the Freezer Drawer
1. Slide open the freezer drawer to its full
extension.
2. Slide open the upper storage drawer to its full
extension.
a
a Upper storage drawer
3. Remove the ice bin from the upper drawer by
lifting up and pulling out at an angle.
a
a Ice bin
4. Remove the upper storage drawer from the
glide rails by lifting up and pulling out at an
angle.
a
a Upper storage drawer
5. Remove the lower storage compartment by
lifting upward at an angle.
a
a Lower storage compartment
6. Using an 8 mm socket wrench, remove the
4 screws (2 on each side) attaching the
supporting frame to the brackets on the
interior panel of the drawer front.
a
a Supporting frame
7. Using both hands, grasp the bottom of the
drawer front. Pull the bottom of the drawer
front toward you while lifting up to remove.
8. Set the drawer front on a soft surface to
protect the finish.
9. Slide the drawer glide rails into the cabinet.
10. Move the refrigerator through the doorway
and into the room near the water and electrical
connections.
Replace the Freezer Drawer
To reinstall the drawer after moving the appliance
to its final location, assemble the parts in reverse
order.
Replace the Doors
1. If removed, reinstall the bottom hinge.
2. Using two or more people, set the refrigerator
door onto the bottom hinge.
3. Insert the top hinge into the top of the door.
4. Using the three screws removed earlier, fasten
the top hinge to the top of the cabinet.
NOTE: Left-hand door only, replace the ground
screw into the top hinge, and then reconnect
the wiring harness.
5. Repeat steps 1 through 4 to replace the
opposite door.
6. Using the three screws removed earlier, reinstall
the top hinge cover and control panel to the
top of the cabinet.

8
Air Flow Path
a
a Fan

9
Evaporator Structure
ba c d e a
a Fuse
b Accumulator
c Sensor
d Heater
e Evaporator

10
Compressor Compartment Structure
a b c d e f g
a Filter dryer
b Power cord
c Compressor
d Condenser fan motor
e Bottom condenser
f Evaporation tray
g Fill valve

11
4. Operation
Display Controls
NOTE: The controls on your model may look different from this and other images in this manual,
depending on your model’s features.
a b c d e f g h i
j mkl
a Ice maker control
b Super freeze control
c Freezer compartment temp control
d Super freeze icon
e Fahrenheit indicator
f Super cool icon
g Refrigerator compartment temp control
h Super cool control
i Energy saving control
j Ice maker icon
k Celsius indicator
l Filter icon
m Energy saving icon
Control Panel
The display will illuminate when the refrigerator is
first plugged in, a control is pressed, or a door is
opened. However the lights will automatically turn
off after 60 seconds.
Setting Compartment Temperatures
When you set a temperature, you are setting an
average temperature for the entire compartment.
The actual compartment temperatures may vary
from the temperatures displayed depending on
the amount and placement of stored food, and the
surrounding room temperature.
Recommended Temperature Settings
• Refrigerator Compartment: 38°F (3°C)
• Freezer Compartment: 0°F (-18°C)
Display Temperatures in Degrees Fahrenheit or
Celsius
• Press and hold SUPER COOL and ENERGY
SAVING at the same time for 3 seconds.
Super
Cool
Energy
Saving
°F/°C
(3s)
NOTE: Either the °F or °C icon will illuminate to
indicate in which scale (Fahrenheit or Celsius)
the temperature is being displayed.
• Press SUPER COOL and ENERGY SAVING
again, to change the temperature scale.
Refrigerator (Fridge) Compartment Temperature
1. Press FRIDGE once to turn on the temperature
control.
Fridge
2. Press FRIDGE repeatedly to cycle through the
available temperature settings, from 47°F to
35°F or from 8°C to 2°C.
NOTE: Each press advances the setting by one
degree.
3. Release FRIDGE when the desired temperature
setting appears.
Freezer Compartment Temperature
1. Press FREEZER once to turn on the
temperature control.
Freezer
2. Press FREEZER repeatedly to cycle through
the available temperature settings, from 6°F to
-12°F or from -14°C to -24°C.
NOTE: Each press of the button advances the
setting by one degree.
3. Release FREEZER to select the desired
temperature setting.
Ice Maker Control
• Press ICE ON/OFF to turn On/Off the ice
maker.
Ice
On/Off
NOTE: When the ice maker is on, the Ice Maker
icon is illuminated.

12
Additional Features
Super Freeze
The Super Freeze feature rapidly lowers the
freezer compartment temperature to freeze
fresh food faster and maintain the temperature
of the frozen food during periods of high usage,
full grocery loads, or temporarily warm room
temperatures.
The Super Freeze feature lowers the temperature
in the freezer compartment to -13°F (-25°C).
• Press SUPER FREEZE once to turn On the
Super Freeze feature.
Super
Freeze
NOTE: When Super Freeze is on, is
illuminated and -13°F or -25°C appears in the
temperature display.
• Press SUPER FREEZE to manually turn off
Super Freeze and return to the previously set
temperature.
NOTE: Super Freeze will automatically turn off
after several hours, and the freezer will revert
to its previous temperature setting.
Super Cool
The Super Cool feature rapidly lowers the
refrigerator compartment temperature to
maintain the temperature of the chilled food
during periods of high usage, full grocery loads, or
temporarily warm room temperatures.
The Super Cool feature lowers the temperature in
the refrigerator compartment to 35°F (2°C).
• Press SUPER COOL once to turn On/Off the
Super Cool feature.
Super
Cool
NOTES:
• When the refrigerator is in Super Cool mode,
appears in the display.
• If not manually turned off, the Super Cool
feature will automatically turn off after
3 hours.
Energy Saving
The Energy Saving feature reduces energy use by
raising the Refrigerator Compartment temperature
to 42°F (6°C) and the Freezer Compartment
temperature to 2°F (-17°C).
IMPORTANT: The compartment temperatures
in Energy Saving mode are not suitable for the
storage of certain food items.
• Press ENERGY SAVING once to turn On/Off
this feature.
Energy
Saving
NOTE: When the refrigerator is in Energy
Saving mode, is illuminated.
Water Filter
Replace the water filter every 6 months to ensure
the highest possible water quality.
After about 300 gallons of water has been
dispensed, the filter icon will blink to indicate it
is time to purchase a replacement water filter.
A new filter can be purchased from the retailer
where you purchased the refrigerator or from
Hisense after-sales service system.
NOTE: Make sure to purchase the correct water
filter for your refrigerator model.
After replacing the water filter, press and hold
both the ICE ON/OFF and the SUPER FREEZE
controls at the same time for 3 seconds to reset
the filter status clock.
Ice
On/Off
Super
Freeze
NOTE: The blinking will stop when the clock is
reset.
When you replace the water filter, it is normal for
a small amount of water to leak from the filter and
water line.
Demo Mode
Demo Mode is used when the refrigerator is
displayed in the store. The controls will function
however the refrigerator will not cool.
To Activate Demo Mode:
• Press and hold both the ICE ON/OFF and the
ENERGY SAVING controls at the same time for
3 seconds.
Ice
On/Off
Energy
Saving
NOTE: To indicate the refrigerator is in Demo
mode, “OF” will appear in both the Fridge and
Freezer temperature displays.
To Cancel Demo Mode:
• Press and hold both the Ice On/Off and the
Energy Saving controls at the same time for
3 seconds.
NOTE: To indicate the refrigerator is no longer
in Demo mode, the display panel will illuminate
for 3 seconds and a beep will sound 3 times.

13
Water and Ice
Water Clouding Phenomenon
Water coming into the refrigerator flows through
an alkaline water filter. In the filtering process the
water pressure increases, and the water becomes
saturated with oxygen and nitrogen as it flows
from the filter. When this water flows out into the
air the pressure plummets and the oxygen and
nitrogen get supersaturated which results in gas
bubbles. The water may temporarily look misty or
cloudy due to these oxygen bubbles. After a few
seconds the water will look clear.
Water Dispenser
The water dispenser is located in the left side of
the refrigerator.
1. Open the refrigerator doors, and press the
water dispenser button to get water.
2. Move your glass downward on the dispenser
pad and press inward.
3. Hold the glass underneath the dispenser for
2-3 seconds after releasing the dispenser
button because water may continue to
dispense after the button is released.
Remove and Replace Water Filter
Remove the Water Filter
1. Shut off the water supply.
2. Turn the water filter counterclockwise a quarter
turn.
a
a Water filter
3. Keeping the water filter in a horizontal position,
pull the filter from the filter compartment.
NOTE: When removing the filter, some water
may leak from the filter or compartment
opening.
4. Remove and empty the water filter tray in the
compartment, and then dry the compartment
and the tray before replacing it into the
compartment.
a
a Water filter tray
5. Turn on the water supply.
Replace the Water Filter
1. Remove the new filter from its packaging.
2. Insert the new filter into the filter compartment.
3. Push the filter inward, and then turn it
clockwise until it locks into place.
Flush the Water Filter
After installing the replacement water filter it is
important to flush air from the water line so that
water will not drip from the water dispenser.
1. Turn on the main water supply.
2. Dispense 2.5 gallons of water (flush for
approximately 5 minutes) to remove trapped
air and contaminants from the system.
NOTE: Do not dispense the entire 2.5 gallon
amount continuously. Depress and release the
dispenser pad for cycles of 30 seconds ON and
60 seconds OFF. In some homes, additional
flushing may be required.
3. Open the refrigerator door to make sure there
are no water leaks coming from the water filter.
Reverse Osmosis Systems
The pressure of the water supply coming out of a
reverse osmosis system going to the water inlet
valve of the refrigerator needs to be between
30 and 125 psi (207 and 862 kPa).
If a reverse osmosis water system is connected to
your cold water supply, the water pressure to the
reverse osmosis system needs to be a minimum of
40 to 60 psi (276 to 414 kPa). If the water pressure
to the reverse osmosis system is less than 40 to
60 psi (276 to 414 kPa):
• Check to see whether the sediment filter in the
reverse osmosis system is blocked.
• Replace the sediment filter, if necessary.
• Allow the storage tank on the reverse osmosis
system to refill after heavy usage.
NOTE: A refrigerator water filter may further
reduce the water pressure when used in
conjunction with a reverse osmosis system.
Remove the refrigerator water filter.

14
Door Leveling and Alignment
Level Refrigerator
The refrigerator must be level to maintain optimal
performance and appearance.
1. Turn the leveling feet on the bottom, front of
the cabinet to raise or lower that side of the
refrigerator until the refrigerator is level side-
to-side.
2. Turn both feet, by the same amount, to slightly
raise the front of the refrigerator. This will make
it easier for the doors to close.
NOTE: Having someone push against the top
of the refrigerator takes some weight off the
leveling feet. This makes it easier to turn the
feet.
Align Doors
If the edges of the refrigerator doors do not align
with each other, you can make adjustments.
Using Adjustable Foot
• Turn the adjustable foot to raise or lower that
side of the refrigerator.
• Clockwise - to raise
• Counterclockwise - to lower

15
Defrost Mode
Automatic Defrost
When the accumulated running time of the compressor reaches the set point (dependent on the
environmental temperature) the compressor will automatically enter defrost mode.
Start
Compressor stops
Evaporator motor stops
Damper stops
Defrost heater works
Evaporator temperature reaches the
set point. Exit Defrost mode.
Defrost heater stops
Compressor starts after
several minutes delay
Evaporator motor starts after
several minutes delay
Damper starts

16
5. Diagnostic Process
Error Code Summary
CODECODE DISPLAY AREADISPLAY AREA PROBLEMPROBLEM
E0 Refrigerator temperature display area Environment sensor malfunctions
E1 Refrigerator temperature display area Refrigerator sensor malfunctions
E3 Freezer temperature display area Freezer sensor malfunctions
E4 Freezer temperature display area Freezer defrost sensor malfunctions
E8 Refrigerator temperature display area Humidity sensor malfunctions
E9 Freezer temperature display area Ice maker sensor malfunctions
Eb Freezer temperature display area Ice maker malfunctions
Ec Refrigerator temperature display area Communication sending malfunctions
Er Refrigerator temperature display area Communication receiving malfunctions
F1 Freezer temperature display area Freezer fan malfunctions
dr Freezer /Refrigerator temperature
display area
Closed Freezer/Refrigerator doors or the
door switch malfunctions
NOTE: Fault codes will show for the first four minutes after the refrigerator is plugged in. Codes will
appear in the display area specific to the section where the error occurred.

17
Environment or Humidity Sensor Error
Start
Is the sensor wiring connection
an open circuit or a short circuit?
Replace the humidity module
Repair the wiring
Y
N
NOTES:
• The Environment Sensor: Pins No. 1 and No. 3
on CN9
• The Humidity Sensor: Pins No. 1 and No. 4 on
CN9
1. Check the voltage across Pins No. 1 and No. 3
(5 volts DC) and across Pins No. 1 and No. 4
(1.2 to 3.5 volts DC). If the result is abnormal,
the humidity sensor is faulty.
2. Replace the humidity sensor.
Normal Voltage Measurement:
• Pins No. 1 and No. 3 is 5V
• Pin No. 4 is between 1.2V and 3.5V (the voltage
will vary depending on ambient temperature
and humidity).

18
Ice Maker Sensor Error
Start
Is the sensor connected
to the mainboard?
Is the sensor connecting wiring
open circuit or short circuit?
Is the sensor OK?
Replace the mainboard
Plug the sensor
into the mainboard.
Repair the wiring
Replace the sensor
N
Y
Y
Y
N
N
NOTE: The Ice Maker sensor corresponds to pins No. 11 and No. 12 on the CN5 connector of the
mainboard.

19
Other Sensor Errors
Start
Is the sensor connected
to the mainboard?
Is the sensor connecting wiring
open circuit or short circuit?
Is the sensor OK?
Replace the mainboard
Plug the sensor
into the mainboard.
Repair the wiring
Replace the sensor
N
Y
Y
Y
N
N
1. Use a multimeter to measure the resistance of the sensor. If the circuit is open or there is a short
circuit, the sensor is faulty.
2. Replace the faulty sensor.
Sensors correspond with pins on the CN4 connector of the mainboard:
Ground Pins: Pins No. 1 and No. 2
Refrigerator Compartment sensor: Pins No. 8 and No. 12
Freezer Compartment sensor: Pins No. 9 and No. 12
Freezer Defrost sensor: Pins No. 10 and No. 12

20
Ice Maker Error (Eb)
Check the wiring connection between the mainboard and the ice maker (Pins No. 7~ No. 10 on the CN5
connector of the mainboard), and repair the connection if it is broken.
Input 12V power to Pins No. 7 and No. 8 on CN5 connector, to check whether or not the ice maker can
rotate normally in both directions. If the ice maker does not rotate normally, replace the ice maker or
mainboard.
NOTES:
• White wire: Connects power
• Red wire: Connects GND