MCBR1010 SERIES SERVICE MANUAL - HVAC-Talk
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Transcript of MCBR1010 SERIES SERVICE MANUAL - HVAC-Talk
Hefei Meiling Company
Ltd.Aug,2006
CATALOGUE 1. PRODUCT BRIEF ……………………………………… 3
2. COOLING SYSTEM ………………………………… 6 3. CONTROLING SYSTEM ……………………… 8
4. EXPLODE VIEW ……………………………………… 11
CHAPTER 1 PRODUCT BRIEF This product is a newly developed frost-free refrigerator of our
company.
The product's external appearance is special and decent
sculpting.
It is the whole box hull structure, poured foam behind, ensured
foamed layer thickness equality. So the heat preservation
function is more excellent
It is the whole foamed door structure, designed to a thin door
gasket structure that can keep cold air effect better and with
maximum limit attain economy energy effect.
In the frozen room door racks are used that it can enlarge the
storage space and increment to store.
In the refrigerate room can rack is used that it can easily store
and take to take to easily pull a soft beverage product such as
can.
In the cold system wings slice type evaporate is used that it
can spread hot efficiency increment and make cold effectively.
Control the system accords with American UL safe attestation
request, you can trust an usage please.
Structure sketch plan and main parts name of that product
1.FREEZER BIN 2.REFRIGERATOR BIN
3.CAN DISPENSER 4.FREEZER SHELF
5.FREEZER TEMPERATURE
CONTROL KNOB
6.REFRIGERATOR TEMPERATURE
CONTROL KNOB
7.LAMP COVER 8.REFRIGERATOR SHELF
9.CRISPER COVER 10.CRISPER
11.LEVELING LEGS
The chapter 2 colding system
Colding system principle diagram
Explain: refrigerant processing
Compress left condenser connect pipe
Suction pipe right condenser
Evaporator connect pipe
Capillary pipe filter anti-coagulate pipe
Two, function parameter form
Technology parameter BCD-280W
Electric shock classification of
protection aganist
I
Total capacity(L) 280
refrigorator(L) 72 Effective cubage
(L) Freezen (L) 208
Voltage(V) 115
Frequency(Hz) 60
Total input power(W) 130
Defrost power(W) 200
Electricity consumption
(KW.h/24h)
1.05
Refrigerant and inject amount R134a /103g
weight(Kg) 64
Figure dimension(width×depth×
height)
(mm×mm×mm)
600×670×1545
Three, break down analysis:
一、refrigerate room isn’t cool or is cool not better
Break down analysis:
1)the fan is bad or there is the stopper and its rotate speed is
much low(it is much more possibility in after two kind.)
2)Refrigerator air road is not free so that breeze is much little
or not.
3)Frost on the evaporate is thick ,or the ice is much more(see a
behind reason analysis)so that refrigerator room is not cold or
cold much better.
4)Refrigerant lacks or leaks
5)The compressor doesn't operate or is bad(see a behind
reason analysis).
6) The door is not closed completely or the door gasket does
not seal properly.
7)Too much food is stored so that cool air dosen’t flow much
better.
二、The frozen room room isn’t cool or is cool not better
Break down analysis:
1) the fan is bad or there is the stopper and its rotate speed is
much low(it is much more possibility in after two kind.)
2) Refrigerant lacks or leaks
3) Frost on the evaporate is thick ,or the ice is much more(see
a behind reason analysis)so that refrigerator room is not cold
or cold much better.
4) The compressor doesn't operate or is bad(see a behind
reason analysis).
5) Too much food is stored so that cool air dosen’t flow much
better.
三、Frost on the evaporate thick or the ice much more
Break down analysis:
Frost on the evaporate thick:
1) The door gasket does not seal properly so that the
compressor doesn't shut down
2) Door is opened too frequently and much water in the foods
is placed refrigerator.
3)The defrost timer doesn’t operate properly.
4)The temperature fuse doesn’t operate properly.
5)The electrical connection doesn’t operate properly.
The ice block up:
There is much water in the system.There need replace a new
filter
四、The compressor doesn't shut down
Break down analysis:
1) The door is not closed completely or the door gasket does
not seal properly.
2) The electrical connection doesn’t operate properly.
3) The temperature fuse doesn’t operate properly.
4) the fan is bad or there is the stopper and its rotate speed is
much low
The compressor doesn't start
Break down analysis:
1) The electrical connection doesn’t operate properly.
2) The starter is bad.
3) The temperature fuse is bad
Noise abnormality
Break down analysis:
In the normal circumstance, compressor is operating and fan
blade is operating,which cause noises. But sometimes noises
isn’t normal ,reason is:
Check if the compressor is installed properly?
Check if interference happens which the fan blade with
surroundings the structure
三 Control system
1. Electricity principle diagram
2.Defrost work principle
It is time to begin from last defrost period,defrost timer port 3
and 4 are connected, the compressor begins to operate,
between the compressor is operated ,the same time the motor
of the defrost timer is operated,when it 16 hours that is the time
of the compressor s operated ,under the drive of defrost timer
motor defrost timer port 3 and 2 are connected ,the
compressor is stopped and auto-defrost is processed.
After getting in to auto-defrost, because the temperature of
the evaporator surface is low, over-temerature control of
heater is connected and defrost timer motor is stopped, defrost
heater is operated.When the temperature of cool evaporator is
rised to about 8 ℃ , over-temerature control of heater isn’t
connected and defrost timer is stopped. The defrost timer
motor is processed after about 7 minutes under the drive of
defrost timer motor defrost timer port 3 and 2 are connected
again,and it is time to end of defrost period, and the
compressor is operated.Such as goes round and round.
3. Electric appliances part of easy troubled detailed statement
3. Parts easy to damage
NO NAME
1 lamp
2 defrost heater
3 over-temerature control of
heater
4 thermal cutoff
5 fan motor
6 defrost timer
7 thermostat
8 compressor
4.wiring diagram