Haier RF-8888-39 User manual

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HAIER
REFRIGERATOR
Service Manual
PART # RF-8888-39
HAIER AMERICA TRADING, LLC
www.haieramerica.com

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TABLE OF CONTENTS
Explanation Of Product Code And Introduction To Series
Specification
Safety Precautions
Parts And Functions
System Flow Chart
Circuit Diagram
Maintenance And Troubleshooting
Troubleshooting And Repairs
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4
5
9
10
11
12
15

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EXPLANATION OF PRODUCT CODE AND INTRODUCTION TO SERIES
H R F 12
12 CuFt
Freezer
Refrigerator
Haier

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SPECIFICATION
Models HRF12
Net capacity (Cu Ft) 11.6
Color White
Power Supply (V/Hz) 115~/60
Rated input power (W) /
Power Consumption (KW. h/24 hours) 1.10
Net Weight (lbs) 159.4
Gross Weight (lbs) 170.5
Unit Dimension (D*W*H)
(Inch)
31 X 23 5/8 X 61
Packing Dimension (inch) 34 5/16 X 27 X 64 7/32
Container Quantity 40’HC(PCS) /

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SAFETY PRECAUTIONS
WARNING!
This appliances uses 115V~/60Hz AC for
power supply.
Voltage has excessive variations, which is
likely to prevent malfunctions like abnormal
noise by processor. It is advisable to use a
750-voltage regulator or a higher power
voltage.
WARNING!
It is advisable to use a separate, dedicated and
secured grounding outlet.
Power cable is filed with three core (grounding) plugs
complying with three core grounding outlet. In no
case should the third plug pin (grounding) of the
power cable be removed.
WARNING!
Do not damage power cable.
Be sure not to unplug unit by power cable.
Hold plug firmly to unplug
Do not let the body of the unit have contact
or press power cable. Take care of power
cables to avoid damage when moving unit.
WARNING!
In case the power cable is damaged.
Worn out cables should not be used.
Replace such damaged cables.

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WARNING!
In the case of the leakage of an
inflammable gas
1. Access leaking area.
2. Open door and windows.
3. Do not temper with unit plug any electrical
device such as refrigerator.
WARNING
Unplug power in these situations
1. Unplug unit prior to cleaning or repairing.
2. Unplug unit before replacing damaged
Lamp to prevent electrical shock.
WARNING!
It is not advisable or prohibited to keep
hazardous, inflammable or explosive items
like acid or alkali into refrigerators.
WARNING!
Do not keep medicine, vaccines or
Chemical reagents in refrigerator.
This refrigerator is household use
and can not store items with strict
temperature requirements.

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Do not place any electrical plugs, regulators
or microwaves on top of the refrigerator. Do
not use any other electric appliance (except
the one the manufacturer has stated) inside
the refrigerator.
Do not store or use gasoline or other flammable
substances in the vicinity of the refrigerator to avoid
fire outbreak.
WARNING!
Do not play with the door to avoid damage.
WARNING!
Do not keep heavy objects on
Refrigerator.
WARNING!
Do not touch refrigerator with your wet hands
when it is in operation to avoid your hand
form getting stuck to the freezer.
WARNING!
Do not spray water onto the unit or install
Unit at a wet place to avoid interferences
with the power source.

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WARNING!
Do not temper with
refrigerator when you do not
have any technical know
how. Seek professional
advice in case of the
refrigerator gets damaged.
WARNING!
Do not keep bottled items in the freezer
Compartment to avoid frost crack.
WARNING!
Unplug power supply when
carrying out cleaning. Switch
power on 5 minutes after to
prevent any damage.
WARNING!
Dismantle door and door gasket
Before disposing off a refrigerator to avoid
damage to unsuspecting persons or children

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PARTS AND FUNCTIONS
Description of components
FUNCTION SCHEDULE
• Air-cooling and automatic defrosting
• Round door design and fashion handles
• Energy efficient
• Adjustable humidity crisper
• Isolated food shelf
• Crisper with adjustable moisture
Moisture in the crisper can be adjusted for satisfaction of vegetables and fruits storage

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SYSTEM FLOW CHART
• Schematic diagram of System Flow Chart
1. Compressor
2. Condenser
3. Dry-filter
4. Capillary tube
5. Evaporator
6. Air fan
• Flow of cold air

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CIRCUIT DIAGRAM
Schematic Circuit Diagram
A- PLUG
B- SWITCH
C- LAMP
D- ICE MAKER (PREPARATIVE)
E- VALVE (PREPARATIVE)
F- THERMOSTAT
G- DEFROST
H- THERMOSTAT
I- DEFROST TIMER
J- FUSE
K- FAN
L- FAN
M- OVERLOAD PROTECTOR
N- COMPRESSOR
O- PTC
Brief description of control the principle.
HRF12 is the forced air-cooling refrigerator with two doors. A mechanical type of all the
controls is generally adopted. The thermostat directly controls the starting and stopping of
compressor, and hence the refrigerator’s temperature.
With the low temperature compensation in the above schematic diagram, when the ambient
temperature is below the set temperature, the switch will be closed and the heating will work,
thus ensuring the normal start, and operation of the refrigerator at a lower ambient
temperature. In such cases, the freezer compartment’s temperature can reach a good point.

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MAINTENANCE AND TROUBLESHOOTING
1. When the refrigerator does not get cold at all

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NO defrosting
3. The freezer and the refrigerating rooms are not sufficiently cold
Does the processor operate?
Is refrigerator installation distant from direct heat?
Is the condenser radiating efficiently?
Is there any hot foodstuff in refrigerator?
Excessive foodstuff stored or interference with cold
air circulation
Is temperature control knob in suitable position?
Is the gasket sealing in good condition?

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Does the fan for
the circulation of
the cold air
operate?
Check for continuity
between terminals 3 and 4
by pressing the door switch
(F, R) lever. Is it normal?
The switch to be
pressed is faulty.
Does the motor rotate
when the door switch
is pressed manually?
Have foreign materials
or frost affect the fan’s
blade?
Is the motor locking?
Remove foreign
materials.
Remove frost.
Replace the motor.
Replace the fan’s
motor
Is the fan’s motor coil
short-circuited?
Is there heavy frost or
ice accumulated on the
evaporator?
Defrost control is in a
faulty condition Replace the
defrost timer
Does the evaporator
get cold when the F-
thermostat is by
passed in the
F-thermostat is in a faulty
condition Replace the F-
thermostat.
Is the evaporator cool
partially after its
operation for more
than 30 minutes?
Is the measured revolution
of the fan’s motor less than
1,100 RMP?
Defective fan motor (faulty
rpm)
Replace the motor.
Defective freezing cycle
unit
The door switch
is faulty

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TROUBLESHOOTING AND REPAIRS
1. NORMAL REFRIGERATOR FUNCTIONS
A domestic refrigerator is comprised of an electric control system and a refrigerating
system. Since both systems work together, it is difficult to tell whether the refrigerating
system is in good working condition. If any part of the refrigerating system or electric
control does not work properly; the refrigerator’s efficiency will decline, operating
properties will destabilize, and in worst cases, it will not function at all.
Sending refrigerators to a service department can be difficult since they are generally
large. At times, normal phenomena are incorrectly diagnosed as troubles. Before we deal
with the recurrent problems of refrigerators, here is a brief outline of normal occurrences
that should not be considered as problems. If any of the occurrences listed below
happens, you can continue to use your refrigerator:
a) Rumbling Sounds
When the compressor of a refrigerator stops running, a rumbling sound will be heard
from the evaporator. This sound is caused by the flow of refrigerant in the evaporator
tube. The refrigerant flows shortly after the compressor has stopped running. This
sound, therefore, does not constitute a problem.
b) Clicking Noises
Refrigerators often make clicking noises. This is also normal. It is the result of the intake
or release of the armature of a current dead weight start relay when the compressor is
started. The compressor motor makes a clicking sound while it is running. This sound is
faint in the daytime but becomes louder at night.
c) Hot Refrigerator Parts
The compressor consists of an electric motor and a compressing apparatus. During its
normal operation, the temperature of the motor’s starter core and windings will range
between 212°F-230°F. The temperature of the piston and cylinder of the compressing
mechanism is normally 212°F due to the heat produced when compressing the
refrigerant. Most of the heat radiates through the compressor casing to the air, therefore
the temperature of the casing is generally between 185°F and 194°F. It becomes
extremely hot, particularly in summer when the ambient temperature is higher than
usual.
All these are normal phenomena.
d) Crackling Sounds
For the direct cooling refrigerator, an irregular crackling sound is caused by expansion
and contraction of the compressor. This sound will not affect the normal operation of the
refrigerator.

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2. COMMON PROBLEMS OF A REFRIGERATOR AND THEIR SOLUTIONS
Refrigerator problems are closely related to the quality of components, level of
workmanship, and owner maintenance. The parameters generally used to determine the
working conditions of a refrigerator include the temperature inside the refrigerator, the
operating rate, electrical power consumption, noise level, and other functional indices. If
any of these indices passes their permissible range, there is a fault with the refrigerator.
During the entire service life of a refrigerator, the probability of problems occurring within
a specific time is called its failure rate. A comparison between the control circuit system of
a refrigerator and its refrigerating system indicates that the failure rate of the former is
higher. When troubleshooting, the first thing you must do is to determine whether the
source of the problem is the control system or the refrigerating system.
There is usually no troubleshooting instrument for the domestic refrigerator. The location
and nature of problems must therefore be determined according to their respective
features. Experience in servicing is very important for troubleshooting. Well-experienced
service technicians can correctly identify and solve problems based on their
comprehensive analysis of the characteristics of the particular problems as well as the
operating conditions for various kinds of refrigerators.
• Three Essential Things To Note During A Checkup
 Look
a) Check the tubing of the refrigerating system for cracks and various welding points for
leakages. If there is a leakage, a distinct oil stain will be seen.
b) Check the suction and the exhaust pressure valves (high pressure and low pressure)
of compressor to see whether they are normal.
c) Check the conditions of the frost attached to its evaporator and gas return tube. It is
abnormal if frost has formed on part of the evaporator or there is no frost attached to
it.
d) Pay attention to the rate at which the temperature decreases in both the refrigerator
and freezer compartments.
e) Check the environment to see whether it is suitable for the refrigerator.
f) Check refrigerator door seal, case, table surface, and heat insulation layer.
g) Look at the main control board to ascertain if various indication states are normal.
 Listen
a) Listen to the noises made while the compressor is running. During the normal
operation of compressor, a slight and uniform humming sound due to undulation of
electric currents will be heard. The sounds listed below indicate a malfunction.

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i. Humming sounds from a fully enclosed aggregate unit indicate that the motor was
not started properly.
ii. Clattering sounds from the start relay indicate that the start contacts cannot be
released normally.
iii. Whistling sounds indicate the release of high-pressure gas from a crack in the
pressure tube inside the compressor.
iv. Clucking sounds indicate that the suspended spring inside the compressor has
broken
v. Knocking sounds from inside the compressor indicates that a large quantity of
moist refrigerant vapor or refrigerating oil has linked into the compressor cylinder.
vi. Striking sounds from metal parts inside the compressor indicate that moving parts
are loose.
b) Listen to the gas flowing in the evaporator by opening the refrigerator door while the
compressor is in operation. Normally, refrigerant circulating in the evaporator
produces a gentle whistling accompanied by a sound similar to water flowing. If only
the whistling can be heard and there is no sound similar to water flowing, then the
refrigerant has already percolated. If neither sound can be heard, the filter or capillary
is clogged.
.
 Touch and Feel
a) Feel the compressor while it is running. Its temperature should be less than 194ºF. Its
temperature may exceed 194ºF if it has been running for an extended period.
b) After the compressor has operated for 5~10 minutes, feel the condenser. The
temperature of its upper part should be higher than that of its lower part (or its right
part is hotter than its left part, depending on the type of condenser coil). This indicates
that the refrigerant is circulating properly. If the condenser is not hot, then the
refrigerant is leaking. If the condenser is hot for only a few minutes and then cools
down, the filter and capillary are clogged. If hot air is blown out of the forced air-
cooling condenser, the system is out of order.
c) Feel the filter’s temperature. Normally, the temperature on the filter’s surface should
be a little higher than the ambient temperature. If the filter is lower than the ambient
temperature, then the meshes of its screen are clogged. This obstructs the flow of
refrigerant and causing a drop in temperature due to throttling.
d) Feel the temperature of exhaust gas from the refrigerating system. The exhaust gas
should be extremely hot. If the refrigerator has an enclosed compressor refrigerating
system, there should be no frost or condensation on the gas suction tube. However,
frost and condensation may appear for a very short time period when immediately
after starting the machine.
Do not use only one of the indicators from the checklist above to decipher the state of

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your refrigerating system. It is advisable to find out two or more abnormal phenomenon,
or conduct comprehensive troubleshooting because several kinds of troubles may share a
common abnormality.
3. ANALYSIS OF TROUBLES AND TROUBLESHOOTING
a. Poor Refrigerating Effect
The “poor refrigerating effect “refers to when the refrigerator operates normally, but does
not cool to the temperature indicated by the thermostat. Possible causes are discussed
and analyzed below:
i. Refrigerant leaks
Analysis of Trouble
The refrigerant leaks will result in an insufficient refrigerating capacity. This will lead to
lower gas suction and exhaust pressure as well as hotter exhaust gas. The exhaust tube
will become extremely hot, and the sound of gas flowing from outlet of the capillary will
become louder than usual. After shut down, the balance pressure in the system is lower
than the saturation pressure corresponding to the same ambient temperature.
Remedy
Locate the refrigerant leak points immediately, and note welding points and parts where
the leaks occur. While troubleshooting, pay attention to those parts that are liable to leak,
check main connection points for oil seepage and tubing for cracks. After repairing the
leak points, refill the refrigerant. If you have problems detecting the leak points, charge
the system with nitrogen to help identify leaks. Drain the system of the nitrogen before
refilling with refrigerant.
2) Too much refrigerant in the system
Analysis of Trouble
a) If amount of refrigerant in the system exceeds its nominal capacity, the excess
refrigerant will displace the evaporator. This will reduce the heat-dissipation area and
decrease the refrigerating efficiency. Malfunctions caused by excess refrigerant are:
gas suction and exhaust pressures increase, condenser becomes hotter, the electric
current of the compressor rises, frost forms on the evaporator and gas return tube,
and the refrigerator temperature drops slowly.
b) If excessive refrigerant has been charged, the liquid refrigerant that cannot evaporate
in the evaporator will return to the compressor. This will cause “liquid striking.” The
liquid refrigerant evaporates and effervesces as soon as it flows into the refrigerating
oil at the bottom of compressor. If the condition is severe, foams will cover the inside
the compressor housing and be sucked by the piston, causing damage to the
components of compressor.
Remedy
According to the operating procedures, it is mandatory to turn the machine off. After
several minutes, open the refrigerant charging tube and let the refrigerant escape from it,
replace the dry filter, refill the refrigerant after evacuating, and then seal the charging port.

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3) There is air left in the refrigerating system
Analysis of Trouble
Residual air in the refrigerating system will reduce its refrigerating efficiency. Major effects
are an increase in temperature of the segment from the compressor outlet to the
condenser inlet and an increase in gas suction and exhaust pressures. However, the gas
exhaust pressure will not exceed its rated value. Due to the air in the system, both the
gas exhaust pressure and temperature will rise. In addition, the sound of gas flowing will
become intermittent and louder.
Remedy
Turn off the refrigerator, and wait for several minutes. Next, open and evacuate the
tubing. Then refill the system with refrigerant.
4) Low efficiency of compressor
Analysis of Trouble
Low efficiency of a refrigerating compressor refers to the actual reduction of gas
discharge capacity and the corresponding reduction of refrigerating capacity under the
condition that the refrigerant in the system is unchanged. This typically occurs when the
compressor has been is use for a long time.
Remedy
Measure the high and low pressures with pressure gauges to see whether they are
normal. If an abnormal sound comes from the compressor or the temperature of its
causing is too high, cut the discharge port open and operate the compressor. Inspect to
see if there is pressure at the discharge port with your finger. In a normal compressor, it is
difficult block the discharge port with your finger.
5) Too thick frost layer formed on evaporator
Analysis of trouble
If a direct cooling refrigerator is to be used for a prolonged period, make sure that you
defrost its evaporator regularly. If you fail to do so, the frost layer on the evaporator tubing
will become thicker and thicker. Heat conduction will be severely affected when the whole
tubing is wrapped with a transparent ice layer, and finally the temperature in the
refrigerator cannot fall to the prescribed range.
Remedy
Turn the refrigerator off and prepare for defrosting. Open the refrigerator’s door to let air
inside or use a fan to speed up air moving into the refrigerator to quicken the defrosting
process. Never strike the frost layer with any iron tools or wooden stick in order not to
damage the evaporator tubing.

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6) Refrigerating oil in evaporator tubing
Analysis of Trouble
During the refrigerating cycles, small amounts of refrigerating oil may remain in the
evaporator tubing. However, if there is considerable refrigerating oil left in the evaporator
after an extended period of operation, the heat conduction effect will be severely affected.
The result is poor refrigerating effect.
Remedy
If there is no frost on the evaporator, then there is a high probability that the deterioration
of refrigerating effect is due to the accumulation of refrigerating oil in the evaporator
tubing. Remove accumulated refrigerating oil, dismantle the evaporator, purge it
thoroughly, and then dry it. If it is difficult to dismantle, fill the evaporator tubing with
refrigerant from the evaporator inlet several times to remove the refrigerating oil. Then,
purge and dry it with nitrogen.
7) Flow obstructed in refrigerating system
Analysis of Trouble
If the refrigerating system was not purged thoroughly, the filter screen meshes become
clogged by dirt. This results in a decrease in flow rate and a poor refrigerating effect. The
effects of clogged filters included: decrease of gas discharge pressure, the drop in the
temperature of discharged gas, and, for severe cases, condensation and frosting may
appear.
Remedy
Purge the tubing. After replacing, the dry filter or cleaning it thoroughly, refill the system
with refrigerant and seal the charging port.
• No Refrigerating
“No refrigerating” refers to a situation where the compressor runs normally, but the
refrigerator’s temperature does not decrease. While servicing, careful attention will be
required to find correct the cause. The most common causes for this malfunction are
analyzed below.
1) The entire refrigerant has leaked
Analysis of Trouble
Leak points in the refrigerating system have not been found and repaired timely, allowing
refrigerant to leak completely. There are two kinds of leaks: slow leaks and fast leaks.
Symptoms of total leakage of refrigerant are:
i. The compressor can be started easily (if there is no damage to the compressor parts)
ii. The operating current becomes low
iii. The gas suction pressure increases
iv. The discharge pressure decreases