Haier HTE21W User manual

HAIER
REFRIGERATOR
Service Manual
PART# RF-8888-38
HAIER AMERICA TRADING, LLC
www.haieramerica.com

2
Table Of Contents
Contents 2
Product Code Explanation And Series Introduction 3
Specification 4
Safety Precautions 5
Parts And Functions 9
Function Schedule 10
System Flow Chart 11
Circuit Diagram 12
Maintenance And Troubleshooting 13

3
Product Code Explanation And Series Introduction

4
Specifications
Models HTE21W HTQ21J
Net capacity (Ft3) 20.7 20.7
Color
WW: white
BB: black
QQ: biscuit
SS: stainless steel
WW: white
BB: black
QQ: biscuit
SS: stainless steel
Power Supply
(V/Hz) 115~/60 115~/60
Rated Input Power
(W) / /
Power Consumption
(kW.·h/24h) 1.40 1.40
Net Weight (lbs) 247 247
Gross Weight (lbs) 265 265
Unit Dimension
(D*W*H) (inch) 33 x 31¼ x 65 7/8 33 x 31¼ x 65 7/8
Packing Dimension
(inch) (D*W*H)
35 x 34 7/16 x
66 7/32
35 x 34 7/16 x
66 7/32
Container Quantity
40’HC (PCS) 42 42

5
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.

6
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 or 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 cannot store items with strict
temperature requirements.

7
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.

8
WARNING!
Do not temper with refrigerator when you do
not have any technical know how. Seek
professional advice in case 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 damag
unsuspecting persons or children

9
Parts and Functions
3-1. Description of Components
1. Ice Making Ware
2. Ice Storage Box
3. Wire Shelf
4. Refrigerator Lamp
5. Snack Ware
6. Cantilever Shelf
7. Humidity Adjusting Slide
8. Door Rack
9. Egg Tray
10. Bottle Rack
11. Tall Bottle Rack
12. Humidity Maintaining Box

10
Function Schedule
1. Air-cooling and automatic defrosting
2. Round door design and fashion handles
3. Energy-saving
4. Adjustable humidity crisper
5. Isolated food shelf
6. Crisper with adjustable moisture
Moisture in the crisper can be adjusted for satisfaction of vegetables and fruits
storage

11
System Flow Chart
1. Schematic Diagram Of System Flow Chart
1. Compressor
2. Condenser
3. Dry Filter
4. Capillary Tube
5. Evaporator
6. Air Fan
2. Cold Air Flow

12
Circuit Diagram
1. Schematic Circuit Diagram
A. Plug
B. Switch
C. Lamp
D. ICE Maker (Preparative)
E. Valve (Preparative)
F. Thermostat
G. Defrost Timer
H. Thermostat
I. Defrost Heater
J. Fuse
K. Fan
L. Fan
M. Overload Protector
N. Compressor
O. PTC
Brief Description of Control Principle
HTE21/HTQ21 are forced air-cooling refrigerators 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.

13
Maintenance Service And Troubleshooting
1. When the refrigerator does not get cold at all
First check defrost
timer motor and
then rotate the cam
manually until click
is heard. OKEY if
compressor runs.
Check Point
Indication Cause Of Trouble Instruction (diagnosis)
Check for
continuity
Does the
compresso
r have
Does the
compressor have
power?
Does the
compressor
run?
Freezer
Thermostat
Defrost Timer
Starting
Relay
Check for continuity
between terminals (2
and 5) whiles in an
upright position.
Overload
Protector
Check for continuity
between terminals (1
and 3)
YES
YES
YES
YES
Starting
Relay
In upside an down
position, check for
continuity between
terminal (2 and 6)
YES
Electrolytic
capacitor (at
115V
)
No continuity between
terminals. If normal,
resistance drops to 0
temporarily & then rises
to infinity
YE
S
NO
NO
NO
NO
NO
Compressor
- Motor lock
- Inter-lay short of
motor
(1) Disconnect the power
(2) Remove the lead from capacitor
and as a precaution discharge it by
shorting the terminals with an
insulated screw drier
Does the refrigerated
room lamp illuminate
when the door is
closed
Check the power
source and power
cord
NO
YES
NO

14
Faulty Compressor Unit
- Compressor
- Refrigerator cycle
The refrigerator remains warm
even though the compressor
has been operational for more
than 30 minutes.
Does defrost timer operate? Defrost Check for continuity
between terminals
YES YES
3. No Defrosting
Does the compressor stop
running when the shaft of
the defrost timer is turned
clockwise until its first click
is heard.
T
hermal Fuse
Check for the continuity
between WHITE lead wires. At
room temperature, it should
be closed.
Bimetal
T
hermostat
Check for the continuity
between BROWN and WHITE
lead wires. At room
temperature, it should be
closed.
DCheck for the continuity
between RED and WHITE lead
wires
The Freezer And Refrigerator Rooms Are Not Sufficiently Cold
Check Point Indication Cause Of Trouble
Instruction (Diagnosis)
- 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?

15
Does the cold
air circulation
fan work?
Check for continuity
between terminals 3 an
d
4 by pressing the door
switch (F, R) lever.
Does it work normal?
Faulty Door
Switch
NO
NO
Does the fan motor
rotate when pressing th
e
door switch lever by
hand?
Door switch on
door is panel
faulty.
YES
YES
Is the fan blade
dusty or frosty?
Is the motor
locked?
Remove all foreign
material or frost.
Replace the motor
Has the fan motor
coil short-circuited?
Replace the fan
motor
Is there heavy
frost or ice
accumulated to
the evaporator?
Defrost Control is
faulty
Replace Defrost
Timer
Does evaporator
get cold, when
the f-thermostat
is by-passed?
F-Thermostat is
Fault
y
Replace the
F-Thermostat
Is the evaporator
cooled only partially
after operating for
more than 30
minutes?
Is the measured revolution
of the fan motor less than
1
,
100 r
p
m?
Defective Fan Motor
(faulty rpm). Replace
the fan motor.
Defective Freezin
g
C
y
cle Unit

16
4. 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.

17
1. 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) Pay attention to the rate at which the temperature decreases in both the
refrigerator and freezer compartments.
d) Check the environment to see whether it is suitable for the refrigerator.
e) Check refrigerator door seal, case, table surface, and heat insulation layer.
 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.

18
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 your refrigerating system. It is advisable to find out two or more

19
abnormal phenomena, or conduct comprehensive troubleshooting because
several kinds of troubles may share a common abnormality.
2. ANALYSIS OF PROBLEMS AND TROUBLESHOOTING
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 Problem
The refrigerant's leakage 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 Problem
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.

20
3) There Is Air Left In The Refrigerating System
Analysis of Problem
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 Problem
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 Problem
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.