Haier HRB-271 User manual

CAUTION

READ THIS MANUAL CAREFULLY TO

DIAGNOSE TROUBLE CORRECTLY

BEFORE OFFERING SERVICE

SERVICE MANUAL

Refrigerator

Features :

1. Optimized condensing system.

2. Pre-cooling for defrosting for freshness storage.

3. Intelligent operation for automatic operation.

4. Automatic problem detecting and warning system,

door cooling warning system.

MODELS :

HRB - 306

HRB - 331

HRB - 271

HRB - 331MPE

CONTENTS

SAFETY PRECAUTIONS.

SPECIFICATIONS.

PARTS IDENTIFICATIONS

DISASSEMBLY.

Refrigerator door ( Gasket ).

Freezer door.

Lock Supporter.

M / F duct.

Louver freezer.

CONTROL AND DISPLAY SYSTEM.

The function of key.

The control of key.

REFRIGERATION PRINCIPLE

System flow chart.

System flow serograph.

CIRCUIT DIAGRAM

Brief principle diagram.

PCB diagram.

TROUBLE SHOOTING.

No cooling.

The compressor doesn’t stop

Cooling capacity is insufficient

The compressor doesn’t stop.

Normal phenomena-Not trouble for refrigerators.

Three essentials for checkup.

Analysis of troubles and troubleshooting.

EXPLODED VIEW

SPARE PARTS LIST.

7

6

5

2

1

11

12

14

16

42

44

SAFETY PRECAUTIONS

This appliance uses 220-240V / 50Hz Ac for power Supply

failure in operation and damage to the control panel.

the moisture of the compressor will occur if voltage is

outside the range 187-242V unless a regulator

with a capacity 750W or higher is installed

It is required to use separate dedicated outlet with

securely grounding

The power cable of this appliance is fixed with three-core

(grounding) plug complying with three-core (grounding)

outet. In no case should the third plug pin ( grounding )

of the power cable be cut or removed

In case of damaged power cable

when the power cable or plug has been warned is

profiled to continue to use il in this case. It is required

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When there is leakage of inflammable gas

Close the valve of leaking gas

Open doors and windows

Neither try to drag nor insert any power plug for

any electrical unit such as refrigerators.

Do not damage power cable

Be sure not to pull out the plug on the appliance

By drawing the power cable. Be sure to directly pull

Out it on the outlet by rigidly grasping the plug.

Do not cause the appliance body press the power

Cable, nor should any people lead on it.

When moving the appliance from wall, be careful

Not to roll or damage power cable.

Please pull out power plug under the following

situations:

Pull out power plug prior to cleaning or repairing

When replacing damaged lamp.it is required to pull

out power plug to prevent electrical shock

2

3

It is absolutely prohibited to put inside

the appliance hazardous inflammable

or explosive articles,strong corrosive

acid,alkali,etc.

Do not keep medicine,vaccine,or

chemical reagent in the appliance.This

refrigerator is for household use,which

cannot store item with strict requirement

for temperature.

Do not store or use gasoline or other

flammable article in the vicinity of the

refrigerator to avoid fire.

Do not place any electrical plugs,

Regulators or microwaves on top of the

Refrigerator. Do not use electric

appliances (Expect those allowed by

manufacturer) inside the refrigerator.

Do not place heavy or unstable articles

or water containers on top of the

Refrigerator.

Do not play by hanging on its door, to

prevent tilting the door or toppling the

refrigerator to hurt person.

SAFETY PRECAUTIONS

4

When the refrigerator has started

Running ,take care not to touch the cold

surface of the freezer compartment with

hand,especially with wet hand.

Otherwise, your skin is liable to be stuck

on the cold surface.

It is strictly prohibited to privately

dismantle or change the appliance.

For the repair of refrigerator, it can be

carried out by professional only.

At no power supply or when carrying

out cleaning, it is required to pull out the

power plug, and to wait atleast 5

minutes for switching ON it again to

prevent damaging its compressor by

continuous starting.

Do not spray water onto the refrigerator,

or place it in wet area susceptible to be

splashed with water, so as to avoid

influencing the electric insulation

performance of the appliance.

Do not put the bottled beer or beverage

in the freeze compartment to prevent

frost crack.

When the appliance is to be discarded,

dismantle its door, as well as its door

gasket to avoid accident occurred when

a child goes inside for playing.

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Front

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Ba

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6

PARTS IDENTIFICATIONS

Ice Tray

Ice Bin

Half Drawer

Middle Drawer

Bottom Drawer

Assy Cover

Vegetable Box

Shelf

Door Rack

Cover Lamp

Ref

Bottle

Separator

44

7

REFRIGERATOR DOOR

1.Remove the hinge cover by pulling it up.

2.Loosen hexagonal bolts fixing at upper hinge to the body and lift the

refrigerator door

3.Pull out the door gasket to remove from the door foam Ass'y.

DISASSEMBLY

8

DISASSEMBLY

FREEZER D OOR

1.Loosen bolts fixing the hinge M to the body and lift the freezer door.

2.Pull

out the

door gasket

to

remove

from

the door

foam

Ass'y.

LOCK SUPPORTER

1.Loosen screw fixing the lock supporter to the body.

2.To remove the lock supporter, pull out it as shown in figure.

SCREW

LOCK SUPPORTER

44

9

M/F DUCT

1.Loosen screw fixing the m/f duct to the body.

To remove the cap screw.

2.Take out the m/f duct.

DISPLAY COVER (MPE Model Only)

1.To remove the cover of the display panel,

Loosen screw fixing the display panel to the door.

DISASSEMBLY

10

DISASSEMBLY

LOUVER FREEZER

1.Loosen top screws fixing the louver freezer to the body.

2.Take out the louver freezer and disconnect the lead wire from the plug.

3.Loosen lower screws fixing the louver freezer front to the louver freezer back

and separate them.

4.Loosen screw fixing the bracket fan motor to the louver freezer back.

11

1.The function of key

1.1 The refrigerator temperature set of key A1:Set refrigerator temperature;

1.2 The time set of key A2:Set hour and minute;

1.3 Super freeze set of key A3:Get into and exit the super freeze state;

1.4 Fuzzy /energy saving/close LED of key A4:Get and exit the fuzzy and energy

saving states and close LED.

2.The control of key

2.1 The refrigerator temperature set:Press the key A1 once ,the numerical value of

refrigerator temperature set begins to flicker ,and get into the refrigerator

temperature set state . Press the key again ,the numerical value of refrigerator

temperature will add 1 . But if the temperature is 10 degrees now, after a more

press it will turn to be 2 degrees. The process is a cycle.

2.2 Time set*Press the key A2 once , the numerical value of hour begins to flicker

, and get into the hour set state .Press the key again ,the numerical value of

hour will add 1 . But if the hour is 23 now , after a more press it will turn to be

00. The process is a cycle . 5 seconds later after the number of “hour” is set,

the number will stop glittering. Meanwhile the number of “minute” begin to glitter,

one more press will increase the the number with one. If the number is 59, one

more press will turn it to be 00. it is a cycle too. 5 seconds later it will be finished

to set the number of “minute”.

2.3 Super freeze set :Press the key A3 once ,the icon of super freeze lights on ,and

get into the super freeze of state ;Press the key again , he icon of super freeze

lights off ,and exit the super freeze of state .

2.4 Fuzzy and Energy saving set : Press the key A4 once. The fuzzy lights on and

get into the state of fuzzy . Press the key A4 again , the icon light of f and exit

the state of fuzzy .At the same time ,the icon of energy saving light on and get

into the state of energy saving .Press the key A4 third , the icon of energy saving

light off and exit the state of energy saving. The process is a cycle.

A1 A2 A3

A4

CONTROL AND DISPLAY SYSTEM

1.

System flow chart

12

REFRIGERATION PRINCIPLE

The Refrigeration system of cooling belongs to the category of a

single-temperature and single-control refrigerating system with one

evaporator and is controlled by a single temperature control

13

2. System flow Chart

Compressor

Evaporation tube

Heatingpipe

Condensor

Filter

Suction pipe

Defrost heater

Evapaorator

REFRIGERATION PRINCIPLE

CIRCUIT DIAGRAM

14

15

TROUBLE SHOOTING

D

1 No

cooling

11

Block by ice or dirty

things,change filter and change

refrigerant again.

YES

NO

No cooling

YES

NO

Refrigerant

leak, check and

repair charge

refrigerant again.

Check and repair according to

the section of "the compessor

doesn't work".

Switch OFF the

Refrigerator and again

switch ON after 5 min.

Is Compressor Start ?

If compressor

can run naturally and

temperature rise

of condenser is

very low

16

2 The compressor doesn’t stop

NO

YES

NO

Compressor doesn’t stop

Does the refrigerator

Cools the Food stuff ?

NO

Check and repair according to

the section of "No cooling".

Adjest and instruct

cosumer how to use

Is cooling capacity

not sufficient

Check and repair according to

the section of “ cooling capcity

is insuffcient”.

Check and repair the

main control panel

Is the Defrost Buttom

Low Cooling

Working ?

High Cooling

NO

YES

Repair/replace

Defrost Buttom

Is Thermostat

Working ?

Repair/replace

Thermostat.

NO

Is Thermostat

set at MAX.

Position ?

YES

1. Is the

the ambient temperature

is very high or the refrigerator is

near by heat resource.?

2. The door was opened too many

times or there are more

fresh food inside?

YES

17

3 Cooling capacity is insufficient

YES

Repair & Recharge

Does the refrigerant

leak slowly?.

No

YES

Cooling capacity is

insufficient

Is the ambient

temperature lower then

o

16 C

Check the thermostat is

correct ?

YES

Adjust and instruct the consumer

How to use

the compressor.

18

4 The compressor doesn’t work

Check If thermostat is

correc

t ?

Check the power

source and power

cord?

Does the I/P

Power has 220V

power

Supply

Check and repair the

Input power supply

Check and repair

compressor and accessory.

YES

Is the Ambient

Temperature Lower than

o

16 C

Does

Bulb glow

when the door is

Opened?

The compressor doesn't

work.

YES

NO

YES

NO

Adjust and instruct

Consumer about uses.

NO

The Refrigerator

19

5 Normal Phenomena’s Not Troubles for Refrigerators

In a domestic refrigerator, there is not only a complicated electric control

system, but also a refrigerating system that is difficult to discern whether it

is in a good working condition. Both the systems are related and affect

each other. If a certain part of a refrigerator works abnormally, Its

refrigerating efficiency will decrease, operation properties will become

unstable ,or even it cannot be used normally for those serious cases.

Refrigerators

are

generally

of

larger

volume

,once

troubles

appear ,to

send

them

to

a

service

department

is

really

a

tough

thing

,if

such is the

case

,the

user

will

always

be

in

suspense

,sometimes

normal

phenomena

will

be

erroneously

regarded

as

troubles

.Therefore

,before

we

deal with

the

topics

of

frequently

occurring

troubles

of

refrigerators

and their

remedies

,we

should

firstly

give

a

brief

account

of

some normal

phenomena

which

are

not

troubles

.In

case

any

one

of

such

phenomena

occurs

,there

is

no

need

to

worry

about

it

,and

the

user

can

use

it at total

ease .

1).When

the

compressor

of

a

refrigerator

has

just

stopped

running ,a

rumbling

sound

can

be

heard

from

inside

its

evaporator

.This

is a sound

caused

by

the

flowing

of

refrigerant

in

the

evaporator

tubing

.Because the

pressure

difference

is

still

greater

after

the

compressor

has

just stopped

running

,the refrigerant

will

flow

for

a

certain

time ,

therefore

,this sound is a

normal phenomenon.

2).A

click

sound

can

often

be

heard

from

the

refrigerator

.This is a

normal

sound

produced

by

the

pull-in

or

release

of

the

armature of a

current

deadweight

start

relay

when

starting

the

compressor .The

compressor

motor

will

produce

a

slight

and

uniform

sound

while it is

running

.This

sound

is

not

easy

to

be

heard

in

the

daytime

,but

of course it

can be

heard distinctly at night.

3).The

compressor

consists

of

an

electric

motor

and

a

compressing

apparatus.

During

its

normal

operation

,the

motor!s

stator

core and

windings

will

rise

to

a

temperature

in

the

range

of

1

o

00 C

~1

o

10 C

,and the

temperature

of

the

piston

and

cylinder

of

the

compressing

mechanism can

also

reach

as

above

1

o

00 C

due

to

the

heat

produced

when

compressing

refrigerant

.Most

of

the

heat

radiates

to

the

air

through

the

compressor

casing

,therefore

its casing

is

generally

at

a

temperature

between

o

85 C

~

o

90 C

It is

very

hot

,particularly

in

summer

when

the

ambient

temperature is

higher .All these are normal phenomena .

4).For

the

direct

cooling

refrigerator

,a

kind

of

irregular

crack

sound can

be

often

heard

when

the

compressor

is

running

for

a

certain

period of time

or has just stopped its running .This sound is caused by the stress relief

due to expansion and contraction when temperature changes ,and will not

affect the normal action of refrigerator

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