Haier HRFZ-250DAA User manual

Order NO. Ref0911S006V0
◎2012(HAIER ELECTRICAL APPLIANCES COR. LTD)
All right reserved. Unauthorized copying and distribution is a violation of law.
Refrigerator
SERVICE MANUAL
MODEL:HRFZ-250DAA
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It
dose not contain warnings and cautions to advice non-technical individuals of potential dangers in attempting to service a product.
Product powered by electricity should by serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
WARNING

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SERVICE
MANUAL
Model
:
HRFZ
-
250DAA
2
Issue
20
12
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4
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9
Rev.
Ref09
11
S00
6
V0
Contents
Table of Contents……………………………………………………………………………2
Chapter 1 General Information ...................................................................................... 3
1-1. General Guidelines ............................................................................................. 3
1-2. Insurance Test ..................................................................................................... 3
1-3. How to read this Service Manual ........................................................................ 4
Chapter 2 Product Feature ............................................................................................ 5
2-1. Specifications ...................................................................................................... 5
2-2. External views ..................................................................................................... 6
Chapter 3 Disassembly .................................................................................................. 7
3-1. Thermostat disassembly ..................................................................................... 7
3-2.The door right-left change .................................................................................... 9
Chapter 4 Adjustments and maintenance .................................................................. 10
4-1. Adjust the adjustable feet .................................................................................. 10
4-2.Adjus the thermostat .......................................................................................... 10
4-3. Maintenance ......................................................................................................11
Chapter 5 Flow chart .................................................................................................... 12
5-1. Refrigeration flow chart ..................................................................................... 12
5-2. Refrigeration flow scenography ......................................................................... 13
Chapter 6 Circuit diagram ............................................................................................ 14
6-1. Brief principle diagram ...................................................................................... 14
Chapter 7 Trouble shooting ......................................................................................... 15
7-1. phenomena and solving .................................................................................... 15
7-2.Compressor parameter ...................................................................................... 18
7-3.Termostat parameter .......................................................................................... 18
Chapter 8 Quick check ................................................................................................. 19
8-1.No cooling .......................................................................................................... 19
8-2.Compressor no start........................................................................................... 20
8-3.Poor cooling ....................................................................................................... 22
8-4.Noisy .................................................................................................................. 23
Haier Group

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SERVICE
MANUAL
Model
:
HRFZ
-
250DAA
3
Issue
20
12
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-
9
Rev.
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Chapter 1 General Information
1-1. General Guidelines
When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have
been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices
such as insulation barriers, insulation papers shields are properly installed. After servicing, make the
following leakage current checks to prevent the customer from being exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatic Sensitive
1-2. Insurance Test
1. Check if there is any leak of current.
2. Cut out the power supply before the repair to avoid an electrical shock hazard.
3. In the case of a live-line test, insulating gloves should be worn to avoid potential electrical shock.
4. Confirm the rated current, voltage and capacity before testing with any kinds of instruments.
5. Watch if the upper door is open when we check something at a lower position.
6. Take out every part in the cabinet before moving the machine, especially things like panels (e.g.
glass shelf).
7. Please wear intact cotton gloves when repair any parts of the evaporator, so that scratches by
the sharp fins can be avoided.
8. If there is a breakdown with the refrigeration system, please surrender the machine to the service
center, else the leaked refrigerant may pollute the atmosphere.
9. The refrigerator use AC of 220-240V with a frequency of 50Hz.
10. A big fluctuation of voltage (exceed the range 187～242V) 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

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SERVICE
MANUAL
Model
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HRFZ
-
250DAA
4
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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.
13. Don’t touch the refrigeration surface of the freezing compartment when the refrigerator is in
operation, especially when our hand is wet, else we may be glued to the surface.
14. Pull out the plug of power supply during clearance or power outage. Wait at least five minutes to
resume the power supply in order to prevent damage to the compressor caused by continuous restart.
Photo used in this manual
The illustration and photos used in this Manual may not base on the final design of products, which may
differ from the products in some way.
1-3. How to read this Service Manual
1-3-1. Using Icons
Icons are used to attract the attention to specific information. The meaning of each icon is described in the
table below:
Note:
A “note” provides information that is not indispensable.
Caution:
A “caution” is used when there is danger that the reader, through incorrect manipulation, may damage
equipment, loose data, get an unexpected result or has to restart (part of) a procedure.
Warning:
A “warning” is used when there is danger of personal injury.
Reference:
A “reference” guides to find additional information on a specific topic.

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SERVICE
MANUAL
Model
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HRFZ
-
250DAA
5
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·Chapter 2 Product Feature
2-1. Specifications
1 Model HRFZ-250DAA
Photo
Commercial brand Haier
Product description Refrigerator
2 Capacity
Total Volume (L) 217
Net capacity 215
Fridge volume net 171
3 Features
Manual Defrost No
Adjustable Temperature Control Yes
Defrost water outlet No
Open-door change (right –left) Yes
Kind of coolant R600a
4 Technical data
Voltage/Frequency 220-240V/50Hz
Input power 80W
5 Aesthetics
Colours
Top cover YES
Door White
6 Equipment or accessories
Adjustable thermostat Yes
Adjustable feet (front / rear) Front
7 Product dimensions
Unit dimensions H/W/D (mm) 1430*550*580
Net weight (Kg) 45

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SERVICE
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HRFZ
-
250DAA
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8 Packing dimensions
Packing dimensions H/W/D (mm) 1473*575*605
Gross weight (Kg) 50
2-2. External views
Function schedule
1. Application of low noise technology
The compressor low noise technology is applied for integration of noise reduction and super freezing.
2. Energy-efficiency

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SERVICE
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-
250DAA
7
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Thick heat insulation is used to minimize temperature gain and to optimize the cooling system for the
most efficient cooling result.
3. Crisper with adjustable moisture
Moisture in the crisper can be adjusted for satisfaction of vegetables and fruit storage
Chapter 3 Disassembly
Cut the power when we demount and install the refrigerator.
3-1. Thermostat disassembly
1
Use the screwdriver to take down the screw on
the control cover.
2
Take down the thermostat knob, and remove the
nut on the control cover.
3
Take down the terminals on the thermostat.
3
2
1

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SERVICE
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HRFZ
-
250DAA
8
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4
Take down the thermostat.
5
We assemble it according to the reverse order.
Note: connect the thermostat connection terminal must accord to the order of photo 4
4

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SERVICE
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HRFZ
-
250DAA
9
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3-2.The door right-left change

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SERVICE
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HRFZ
-
250DAA
10
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Chapter 4 Adjustments and maintenance
4-1. Adjust the adjustable feet
4-2.Adjus the thermostat
Our fridge freezer’ temperature is controlled by means of an adjustable thermostat located at the right
hand side wall of the refrigerator compartment. The thermostat may be positioned anywhere between
1 and 7. With “7” being coldest and “1” means turn off the fridge. And generally we turn the position at
“3-5”.

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SERVICE
MANUAL
Model
:
HRFZ
-
250DAA
11
Issue
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4-3. Maintenance
1. Wash the shelf with tap water. 2. Scrub away the dirty with soft cloth.
3. Use the cleaner to take away the dirty below the Refrigerator.

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SERVICE
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Model
:
HRFZ
-
250DAA
12
Issue
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Rev.
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Chapter 5 Flow chart
5-1. Refrigeration flow chart
Brief Description of System Flow Chart
HRFZ-250DAA is a direct cooling single-system refrigerator; a mechanical type of control is generally
adopted. When the refrigerator is powered on and the refrigerant flows in the sequence
1->2->3->4->5->6->7
1. Compressor 2. Condenser 3. Heating tube 4. Condenser
5. Drier filter 6. Capillary tube 7. Evaporator

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SERVICE
MANUAL
Model
:
HRFZ
-
250DAA
13
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5-2. Refrigeration flow scenography

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SERVICE
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:
HRFZ
-
250DAA
14
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Chapter 6 Circuit diagram
6-1. Brief principle diagram

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SERVICE
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Model
:
HRFZ
-
250DAA
15
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Chapter 7 Trouble shooting
7-1. phenomena and solving
Problems Reasons Solving methods
Compressor
can’t be
started
1. The fuse is broken.
2. Cable broken. The contact of plug,
socket, and cable is broken.
3. The voltage is too low ,and lower than
the rated voltage 220V(The voltage is
between 187V and 242V)
4. The knob of the thermostat is at “MIN”
position (When ambient temperature is
higher than “30” degree centigrade ,set the
knob to “1-3” position; When ambient
temperature is between “16-30” degree
centigrade ,set the knob to the “3-5”
position, and when it is lower than “16”
degree centigrade ,set the knob to the “5-7”
position)
5. The thermostat is out of order
6. The start relay or thermal protection is
out of order or broken.
7. The wire of motor starting coil or
operation coil is broken.
1. Check if there is short circuit and
solve it, if not, change capable fuse
2. Check and contact normally, or
else, change damaged part.
3. Use until the voltage rise to the
rated voltage ,or attach the voltage
stabilizer
4. Set the knob of the thermostat to
the suitable position
5. Change the thermostat
6.Change the start relay or the
thermal protection
7. Measure using R×1 position of
meter, if the wire is short circuit,
changes the compressor.
Compressor
starts too
frequently
1. The distance between protection and the
heater is too close
2. The door gasket does not seal enough or
the cabinet’ heat insulation is not good
3. The condenser’ heat dissipation effects is
poor, and lead to the compressor work
overloaded
4. The setting of the thermostat knob is too
low
1. Adjust the overload adjustable
screw, and increase their
distance.
2. Check and repair the cabinet or
the door gasket.(check if the
door gasket flashed and repair
it )
3. Clean the condenser (for this
model the condenser is in the
cabinet ,so we should clean the
dust on both side of the cabinet)
4. Set the knob of the thermostat

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SERVICE
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HRFZ
-
250DAA
16
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to the suitable position (When
ambient temperature is higher
than 30 degree centigrade ,set
the knob to 1-3 position, When
ambient temperature is
between 16-30 degree
centigrade ,set the knob to the
3-5 position, and when it lower
than 16degree centigrade ,set
the knob to the 5-7 position)
Compressor
runs without
stopping
1. The refrigerant leakage or insufficient
2. The refrigerant is superfluous
3. The thermostat is not work
4. The condenser’ heat dissipation effect
is poor for the dust.
5. The refrigerator insulation layer is
destroyed, and the door gasket’ sealing
is bad.
1. Check and find the leakage
point, let out the refrigerant,
then meld it and vacuumed and
fill the refrigerant again.
2. Let out the suitable refrigerant
(For this model the standard
Refrigerant charge is
R600a ,41g)
3. Check the thermostat, if the
contact space is not right,
please adjust the thermostat
‘high speed screw, and if control
contact is loose, and press it
tightly, if it is no effect, please
change the thermostat.
4. Clean the condenser (for this
model the condenser is in the
cabinet ,so should clean the
dust on both side of the cabinet)
5. Check and repair the cabinet or
the door gasket.(check if the
door gasket flashed and repair
it )

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SERVICE
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Model
:
HRFZ
-
250DAA
17
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There is noise
when the
compressor
running
1. The fridge body is not stable and in level.
2. When the compressor is running ,there is
friction in tube and fridge that lead to
syntony.
3. Compressor fixed screw is too loose
4. The damping washer fixed too tight or
loose or ageing
1. Make the refrigerator stable
(adjust the feet)
2. Move the tube and avoid the
friction (the distance between
tube and tube ,evaporating
dish and side cabinet is more
than 1cm)
3. Fasten the screw
4. Adjust the fixed angle or
change the damping washer
There is no
frost on
evaporator
1. The refrigerant leakage
2. There is ice block or dirty block in the
capillary or the system.
1. Check and find the leakage point,
let out the refrigerant, then meld it
and vacuumed and fill the
refrigerant again.
2. Clean the system with blowing
nitrogen, change the capillary and
vacuum and fill the refrigerant
again.
The
thermostat is
out of order
1. The internal temperature feeling medium
of the thermostat leakage
2. The temperature parameter drift
Change the thermostat
No frosting
1. The door gasket flashed and lead to the
cold air out of the fridge
2. The knob of thermostat is set too high
1. Use the blower to repair the door
gasket (The distance between the
blower air out and the door gasket
is more than 20cm. Do not touch
the door gasket with our hand .And
when blowing the door gasket, pat
the door lightly with our hands.)
2. Change the thermostat (the
method as up saying)
No cooling 1.The refrigerant leakage
2.The knob of thermostat is set too low
1. Check and make sure whether
there is leakage, and find the
leakage point, let out the
refrigerant, then meld it and
vacuumed and fill the refrigerant
again.
2. Adjust the thermostat

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HRFZ
-
250DAA
18
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7-2.Compressor parameter
Part Name Ambient temperature 25°C model:
Compressor
model Main Wiring Auxiliary Wiring
QD65YV Normal 35Ω 29 Ω
Starter
Model QP2-15 / JPQⅡ-15
Max working
voltage 350 V
Max running
current 8.0 A
Overload
protector
Model B50-100
Open
temperature 120±5℃
Close
temperature 61+9/-9 ℃
Run
capacity Normal 3μF
7-3.Termostat parameter
Model
Technology parameter
Warm point Cold point Middle point
Capillary length
On Off On Off On Off
WPF31S-102-
011WX 5±1 -7±1.5 5±1 -25±2 - - 598±15

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SERVICE
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HRFZ
-
250DAA
19
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Chapter 8 Quick check
8-1.No cooling
NO
YES
YES
NO
YES
YES
YES
NO
YES
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
operating 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
For the normal operating current
NO
YES

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SERVICE
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:
HRFZ
-
250DAA
20
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8-2.Compressor no start
Compressor no working
Check if the home power
is connecter
Connect the power
NO
YES
Check if thermostat is set
at
“
0
”
YES
Adjust thermostat setting position
Ambient temperature >25℃ MIN-NORMAL Grade
Ambient temperature <25℃ NORMAL-MAX Grade
NO
Check if the thermostat is
normal
Test if the thermostat is normal under power on status:
Method-1: Setting thermostat to coldest position (5 grade), observe if the machine can be
started. If compressor still not start, it means that the thermostat maybe failure.
Method-2: Turn on the fast freeze switch, and check if the compressor could start, if it can
start, means the thermostat defective, please exchange it ,and if it can not start ,it need to
be next step check.
Check if the starter is
normal?
1. PTC. Test if resistance of PTC starter is 6.8+20/-20%Ω.If so, it means it is normal, and 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.
2. Reverse180 °of hammer-type starter, and if it does not conduct, contact junction
carbonized and check the coil burn .
YES
Check if the overload
protector is normal?
1. Measure whether two ends of overload protector is through using
multi meter 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.
YES
NOT
NORMAL
Compressor
accessories
failure
YES
Compressor
accessories
failure
NOT
NORMAL
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.
YES