Order No. Ref1404S005V0
2014(HAIER ELECTRICAL APPLIANCES COR. LTD)
©All right reserved. Unauthorized copying and distribution is a violation of law.
Chest Freezer
MODEL: HF50CM23NW
HF71CM33NW
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
S
ERVI
C
E MAN
U
AL
SERVICE MANUAL
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Contents
Chapter 1 General Information ............................................................................................................. 3
1-1. General Guidelines ........................................................................................................................ 3
1-2. Insulation Test ................................................................................................................................ 3
1-3. How to read this Service Manual ................................................................................................... 4
Chapter 2 Product Feature ................................................................................................................... 5
2-1. Specification .................................................................................................................................. 5
2-2. External views ............................................................................................................................... 6
Chapter 3 Installation, adjustments and maintenance .......................................................................... 7
3-1. Installation ..................................................................................................................................... 7
3-2 Defrosting and Draining .................................................................................................................. 7
3-3 Cleaning the Freezer ...................................................................................................................... 8
Chapter 4 Disassembly ......................................................................................................................... 9
4-1. Door assembly (Door, hinge, hinge cover) .................................................................................... 9
4-2. Compartment grill assembly .......................................................................................................... 9
4-3. Control panel assembly (Panel, cover board, knob, indicator light) ............................................. 10
4-4. Thermostat assembly .................................................................................................................. 1 1
Chapter 5 Control and display system ................................................................................................ 12
5-1. Control panel ............................................................................................................................... 12
5-2. Starting the Freezer ..................................................................................................... ................ 12
Chapter 6 System flow principle ......................................................................................................... 13
6-1. Refrigeration flow chart ................................................................................................................ 13
6-2. Refrigeration flow scenograph ..................................................................................................... 14
Chapter 7 Circuit diagram ................................................................................................................... 15
7-1. Brief principle diagram ................................................................................................................. 15
Chapter 8 Trouble shooting ................................................................................................................ 16
8-1. Normal phenomena .........................................................................................................
............ 16
8-2. Abnormal phenomena.................................................................................................................. 18
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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. Insulation 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 98～126V) 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. Don’t
pull out or insert the plugs of the appliance.
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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
Icons are used to attract the attention of the reader 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. Specification
/
Superfast freezing.
Adjustable thermostat to realize freezing and
cooling
High pressure and microbiological foam filled door
for energy conservation.
convenient water drain.
External controls.
0%CFC.
Comply with RoHS.
/
/
1. Type Model / HF50CM23NW
HF71CM33NW
Commercial brand / Haier Haier
Product description / Chest Freezer Chest Freezer
Type of appliance (FS=free standing /BI= built-in) / FS FS
Climate class (N=16-32℃ ST=18-38℃ T=18-43℃)
/ N N
2. Key index / / /
Gross capacity l 142 198
Total net capacity l 142 198
Defrosting (Manual-Automatic) / Manual Manual
Kind of coolant (R134a/R600a) / R600a R600a
Foaming components (R141b/C-P) / C-P C-P
3. Technical data / / /
Voltage / frequency/Compressor brand V/Hz 115V/60Hz 115V/60Hz
Input power / currency W/A 1.69A 1.70A
Lowest Temperature °C
≤-18°C ≤-18°C
Energy consumption (EN153) per year kWh/year
216kW·h/year 248kW·h/year
Cooling system:(K=Compressor / A=Absorbtion) / K K
4. Product net dimensions / / /
Unit dimensions (H / W / D) cm 84.5/72/55 84.5/94/55
Net weight kg 33 38
5. Packing dimensions & loadability / / /
Packing dimensions (H / W / D) cm 89.0/77.5/58.0 89.0/99.5/58.0
Gross weight kg 36 36
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2-2. External views
Door
Cabinet
Control panel
Drain pipe
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Chapter 3 Installation, adjustments and maintenance
3-1. Installation
The freezer should be conveniently located for day-to-day use in a dry well-ventilated room.
Do not install the freezer where the temperature will go below 0°F or above 110°F, because it will not
maintain proper temperatures.
Be sure to install the freezer on a floor strong enough to support it when it is fully loaded.
The freezer must be solidly positioned on the floor if it is to function at its best. Shims may be used to
accomplish this wherever the floor is too uneven. If the place selected for the freezer is damp or moist,
place 2 X 4 s (51 mm X 102 mm) under its entire length to assure adequate support.
If the freezer has been inclined more then 45° position, we need wait 24 hours before
restarting the freezer.
3-2 Defrosting and Draining
In most climates, defrosting will be necessary only about twice a year.
To have the freezer operate most efficiently, do not permit more than 1/2” (13 mm) of frost to
accumulate on the shelves.
To remove frost, scrape with a plastic or wood spatula or scraper.
Do not use an ice pick or sharp-edged instrument as it may damage or scratch the freezer.
Do not use any electrical device in defrosting the freezer.
For Complete Defrosting
1. Turn the temperature control to the OFF position and unplug the freezer.
2. Remove all food and place it in corrugated boxes, insulated bags, picnic coolers, etc. Use towels
and newspapers for insulation as needed.
3. With the doo r/lid open, use pans of hot water to speed loosening of frost. Remove large pieces
before they melt.
Chest models have a defrost water drain at the front.
4. Sponge excess water from the bottom of the freezer as it collects to prevent over flowing.
5. After defrosting, clean the inside of the freezer.
6. Replace the drain plug inside the cabinet and the cap on the defrost drain. Fold over and dry the
gasket on the hinge side of the lid.
7. Plug in the freezer. Return the temperature control to its previous position and return food to the
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freezer.
Water may drip from the back flange of the lid cover during defrosting. This is normal. Ice
builds up in the lid insulation when the lid is open for adding or removing food, and melts during the
defrosting operation.
3-3 Cleaning the Freezer
Outside. Protect the paint finish. The finish on the outside of the freezer is a high quality baked-on
paint finish. With proper care, it will stay new-looking and rust-free for years. Apply a coat of appliance
polish wax when the freezer is new and then at least twice a year. Appliance polish wax also works
well to remove tape residue from freezer surfaces.
Keep the finish clean. Wipe with a clean cloth lightly dampened with appliance polish wax or mild
liquid dishwashing detergent. Dry and polish with a clean, soft cloth. Do not wipe the freezer with a
soiled dishwashing cloth or wet towel. Do not use scouring pads, powdered cleaners, bleach, or
cleaners containing bleach.
Inside. Clean the inside of the freezer at least once a year. We recommend that the freezer be
unplugged before cleaning. If this is not practical, wring excess moisture out of sponge or cloth when
cleaning in the vicinity of switches, lights or controls.
Use warm water and baking soda solution-about a tablespoon of baking soda to a quart of water.
Rinse thoroughly with water and wipe dry. Do not use cleaning powders or other abrasive cleaners.
An open box of baking soda in the freezer will absorb stale freezer odors. Change the box ever y three
months.
Care should be taken in moving the freezer away from the wall. All types of floor coverings can
be damaged particularly cushioned coverings and those with embossed surfaces.
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Chapter 4 Disassembly
4-1. Door assembly (Door, hinge, hinge cover)
Unscrew the hinge cover screw with screwdriver, take away the top and bottom cover by pull it, and
then unscrew the screws on the hinge, so the whole hinge could be moved.
4-2. Compartment grill assembly
Unscrew the two screw of grill; we can take away the grill.
Top hinge cover
Bottom hinge cover
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4-3. Control panel assembly (Panel, cover board, knob, indicator light)
Unscrew the compartment grill (refer 4-2), push the panel claw gently with our finger or tools, at the
same time pull panel outside then take away it.
Take away the knob with a sharp-edged tool.
Press the cover board and take it away.
Press two claws on indicator light side and push it from back to front.
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4-4. Thermostat assembly
First take off the knob (refer 4-3), Use turnbuckle spanner or acutilingual plier unscrew the turnbuckle,
and then thermostat can be moved from back of panel.
Note: When assembly thermostat we should placed thermostat in originally direction.
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Chapter 5 Control and display system
5-1. Control panel
Freezing temperature selection is made by setting the control from 1to 7(coldest).
If we want colder or warmer temperatures, adjust the control one step at a time.
Allow several hours after each one-step adjustment for the freezer temperature to stabilize.
5-2. Starting the Freezer
1. Clean the inside of the freezer with a mild solution of baking soda and water
2. Connect cord to power outlet.
3. On models with a Temperature Monitor or High-Temp Alarm Switch, set the switch to the Min
position.
4. Make sure the temperature control is set at 4.
5. Allow freezer to operate for at least four hours before placing food inside.
6. On models with a Temperature Monitor or High-Temp Alarm Switch, set the switch to the ON
position.
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Chapter 6 System flow principle
6-1. Refrigeration flow chart
The refrigeration system of direct cooling single-system cooler belongs to the category of a
single-temperature and single-control refrigerating system with one evaporators and is controlled by a
single temperature control.
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6-2. Refrigeration flow scenograph
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Chapter 7 Circuit diagram
7-1. Brief principle diagram
HF50CM23NW
HF71CM33NW
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Chapter 8 Trouble shooting
8-1. Normal phenomena
Problem Possible Causes What To Do
Freezer does not
operate or
Power-On Light is
not on
Temperature control in OFF or
Min or 0 position.
Move the control to a temperature setting.
Freezer is unplugged. Push the plug completely into the outlet.
The fuse is blown/circuit
breaker is tripped.
Replace fuse or reset the breaker
Freezer
starts/stops too
frequently
Door/lid left open.
Check to see if package is holding door/lid
open.
Too frequent or too long to
door/lid openings.
Temperature control set too
cold.
See About the operation of the freezer
Freezer operates
too long
Door/lid left open.
Check to see if package is holding door/lid
open.
Too frequent or too long
door/lid openings.
Temperature control set too
cold.
See About the operation of the freezer
Inadequate air circulation
space around cabinet.
See Preparing to install the freezer
Fast Freeze switch is in the
ON position (on some
models)
See About the operation of the freezer
Noisy operation
or cabinet
vibrates
Floor may be weak, causing
freezer to vibrate when
compressor is on.
Placing 2 X 4s (51 mm X 102 mm) under the
length of the freezer will help support it and
may reduce vibration.
Cabinet is not positioned
solidly on floor
See Preparing to install the freezer Or use
shims for uneven floor
Freezer
temperature too
warm
Door/lid left open.
Check to see if package is holding door/lid
open.
Too frequent or too long
door/lid openings.
Foods defrosting
Temperature control OFF or
Min or 0 positions.
Move the control to a temperature setting.
Freezer is unplugged. Push the plug completely into the outlet.
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The fuse is blown/circuit
breaker is tripped.
Replace fuse or reset the breaker
Door/lid left open.
Check to see if package is holding door/lid
open.
Too frequent or too long
door/lid openings.
Freezer
temperature too
cold
Temperature control set too
cold.
See About the operation of the freezer
Fast Freeze switch is in the
ON position or has run for too
long (on some models)
About the operation of the freezer
Moisture forms
on outside of
cabinet
Not unusual during periods of
high humidity
Wipe surface dr
Interior light does
not work (on
some models)
No power at outlet. Replace fuse or reset the breaker
Freezer is unplugged. Push the plug completely into the outlet.
Light bulb burned out. Replace bulb.
Door/lid wont
fully close by
itself
Package holding door/lid
open.
Slow starting
time after being
off
Built-in overload product.
Excessive frost
build-up
Door/lid left open.
Check to see if package is holding door/lid
open.
Too frequent or too long
door/lid openings.
Not unusual during periods of
high humidity
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8-2. Abnormal phenomena
8-2-1. No cooling
No cooling
Whether the freezer can start
Test according to the process of the
freezer can not start
Cooling system or drier filter is blocked.
To evacuate and pour the cooling system and
recharge refrigerant again
Whether the temperature knob on “off”
position
Exchange the thermostat
Check whether the working current of
compressor is higher than 120% of
normal operating current
If the noise of compressor is loud
Check whether the working current of
compressor is lower than 80% of normal
o
p
erating current
The working sound of compressor is small
If compressor can run naturally and temperature
raising of condenser is very low
If the temperature raising of condenser
and drier filter is very low
Both high-pressure pipe and low-pressure
pipe temperature are same as the ambient
temperature
Refrigerant leak, check and
repair charge refrigerant again.
Compressor defect and change it
YES
YES
NO
YES
YES
YES
YES
NO
YES
NO
NO
YES
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8-2-2.Compressor no start
Compressor no start
Check if the home power is
connecte
r
Connect the powe
r
NO
Check if thermostat is set at “0”
YES
Adjust thermostat setting position
Ambient temperature >25℃ 1~3 Grade
Ambient temperature <25℃ 4~7 Grade
Check if the thermostat is normal
Test if the thermostat is normal under power on status:
Setting thermostat to coldest position (7 grade); observe if the machine can be started.
If compressor still not start, it means that the thermostat maybe failure.
Check if the starter is normal?
Test if resistance of PTC starter if it is ZERO or INFINITE, means the
starter is out of work. For PTC starter, when shake it, it should not have
noise, if it has, means the starter Magnetic Disk burned.
YES
Check if the overload protector is
normal?
1. Measure whether two ends of overload protector is through
using multimeter Ohm grade. Not thorough means protector is
defective.
2. Measure starting current and running current of compressor
using clamp-type tester. If overload protector act when current is
normal, means protector failure and should be replaced.
Check if the run capacitor is
normal?
Before measurement, remove the capacitor from circuit firstly,
and then connect two terminals for discharge.
1. IF the finger of multimeter swings to 0 quickly and then
swings
back slowly when measuring two poles of capacitor, it means the
run capacitor is normal.
2. If the finger of multimeter does not swing, it means the run
capacitor is open circuit. If the finger of mlimeter swings to 0 and
stops means it is short circuit, if it stops on any other position, it
means the capacitor leaka
ge.
Check if each connector of starter
overload protector, run capacitor
are in good condition?
Check each connectors of the starter overload protector and
run capacitor, ensure each contact is in good condition, then
power on and retest the machine.
Check if the compressor is normal?
YES
Check if the starting current of
compressor excess too much?
Test the resistance parameter of the compressor; if it is
ZERO, inner winding is short circuit. if it is infinite, inner
windin
g
is break circuit
If all technical parameter of compressor and compressor accessories (starter,
overload protector, run capacitor) are normal after above test, but compressor
still can not be started, and overload protector action, the actual starting
current excess too much. This phenomenon usually caused by compressor
inner mechanical failure (cylinder-block or axis-hung problem).
NOT
NORMAL
Compressor
accessories
failure
Compressor
accessories
failure
NOT
NORMAL
YES
Compressor
accessories
failure
YES
NO
YES
NOT
NORMAL
YES
YES
8-2-3 .Noisy
Noisy
Whether has exterior
influence factor?
Whether the sound is normal?
Noise type
Compressor noise
Is there collision between
compressor/pipe/compressor
support bracket/drain pipes?
Whether the compressor
fixing clips or bolts are loose
Whether the damper block of
compressor is disabled or no
flexibility?
Whether terminal box is
fixed tightly?
Compressor-self noise
Relay sound
Compressor
starter noise
Replace
starter
Cooling system noise
Wind blow
sound
Rumble
sound
Refrigerant
eruption
Is the
rumble
sound big?
Whether the
pipeline
does
resonate?
Thecapillary
tube is not
smooth or
has burr.
Is the freezing
evaporator is
fixed tightly?
Refilling
Add shock damper glue
or fix the evaporator
tightly.
Adjust distance
to more than
5mm
Adjust and fix bolts
or fixing clip
Replace rubber
damper cushion
Adjust and fix
Adjust pipeline, or add shock
damper glue
Adjust appliance and
explain to user
Explain to user
Exterior factor and solution measure ：
1. The adjustable foot is not level.--Explained the ground
is uneven, user can use spanner adjust refrigerator food,
locates the freezer in the horizontal position
2. The freezer and other goods bump or near to the
wall--The user may move the goods which bumps or
adjust the distance between freezer and wall (10-20cm)
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
NO
YES
YES
YES
NO
NO
YES
YES
YES
Sincere forever
Haier Group
Haier Industrial Park, No.1, Haier Road
266101, Qingdao, China
http://www.haier.com
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