Haier RF-8888-46 User manual

1
HAIER
REFRIGERATOR
SERVICE MANUAL
PART # RF-8888-46
HAIER AMERICA TRADING, LLC
www.haieramerica.com

2
TABLE OF CONTENT
Content 2
Product Code Explanation And Series Introduction 3
Specification 4
Safety Precaution 5
Parts And Functions 9
System Flow Chart 10
Circuit Diagram 12
Maintenance Service And Troubleshooting 13

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PRODUCT CODE EXPLANATION AND SERIES INTRODUCTION

4
SPECIFICATION

5
SAFETY PRECAUTIONS
WARNING!
This appliances uses 115V~/60Hz AC for
power supply.
Voltage has excessive variations, which can cause the
appliance not to start or cause 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
dama
g
ed.
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
3-1. Description of Components
1. Ice-making ware 7. Humidity adjusting slide
2. Ice-storage box 8. Door rack
3. Wire shelf 9. Egg tray
4. Refrigerator lamp 10. Bottle rack
5. Snack ware 11. Tall bottle rack
6. Cantilever shelf 12. Humidity maintaining box
FUNCTION SCHEDULE
●Air-cooling and automatic defrosting
Round door design and fashion handles
Energy-saving
Adjustable humidity crisper
Isolated food shelf
Crisper with adjustable moisture
Moisture in the crisper can be adjusted to satisfy vegetables and fruits storage

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SYSTEM FLOW CHART
1. SCHEMATIC DIAGRAM OF SYSTEM FLOW CHART

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2. FLOW OF COLD AIR

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Circuit Diagram
1. Schematic Circuit Diagram
Brief Description of Control Principle
HTE18 is the forced air-cooling refrigerator with two doors. A mechanical type of all the control is
generally adopted. The thermostat directly controls the start and stop of compressor, and hence the
refrigerator temperature.
Low Temperature Compensation in the above schematic diagram
When the ambient is below the set temperature, the switch will be closed and the heating will work,
thus ensuring the normal start, and operation of refrigerator at lower ambient temperature, in such
case, the freezer compartment temperature can reach a good point.

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MAINTAINANCE SERVICE AND TROUBLESHOOTING
1. Refrigerator does not chill
CHECK POINT INDICATION CAUSE OF PROBLEM DIAGNOSIS
YES
NO YES
NO
NO
YES
NO
YES YES YES
YES
YES
YES
Does
compresso
r
run?
Is power
supplied to
compressor
?
Starting
relay
In upright position,
check 2 & 5 for
continuity
Overload
p
rotecto
r
Check 1&3
terminals for
continuity
Starting
rela
y
Check for continuity
in upside down
position
Compressor
-Motorbike
-
Inter
-
lay short of motor
Faulty Compressor unit
-Compressor
-Refrigerator Cycle
Refrigerator remains cold
even after compressor on over
30 Minutes
N
o continuity
between terminal if
normal resistances
up
WARNING!
1. Disconnect Power
2. Remove leads from
capacitor
3. Discharge it by
shortening terminal
with screwdriver
Freezer
Thermostat
Electrolytic
capacitor at
115v
Does refrigerator
room illuminate
when refrigerator
door is closed?
Check power source and
p
ower cor
d
Check for continuity

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MAINTENANCE SERVICE AND TROUBLESHOOTING
NO DEFROSTING
Freezer And Refrigerated Rooms Are Not Sufficiently Cold
Check Point Indication Cause of
Trouble
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
g
asket sealin
g
in
g
ood condition?
D
oes
O
p
erate?

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NO NO
NO
YES
NO
YES
NO
YES YES
YES
NO
NO YES YES
NO
YES YE
YES
NO
Does the fan for
circulating cold
air operate?
Check for continuity
between terminal 3 and 4
and by pressing the door
switch
(
F, R
)
lever
Faulty door
switch
Does the fan motor rotate
when pressing the door with
switch? Lever?
Pressing of the door
switch on the door
panel is in faulty
condition
Is the fan blade affected
by foreign material or
frost? Is motor locking?
Remove foreign
material, frost and
replace motor
Is fan motor coil short-
circuited?
Replace the fan motor
Is evaporator
gathered with
heavy frost or
ice?
Defrost control faulty (see
p
a
g
e
)
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Does evaporator
get cold when F-
Thermostat by-
passed
Replace defrost timer
F-thermostat is in faulty
condition
Replace the F-
thermostat
Does evaporator get
cool partially only
after operating for
more than 30 minutes?
Is measured revolution of fan
motor 1,100 rmp? Fan motor faulty.
Re
p
lace motor
Defective freeing cycle
unit

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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 indicate 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.

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 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.
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 leaked 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

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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 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:
1) 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 refill 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

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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.
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 in
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 to 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.