Refrigeration

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mcss-90180nw

Category: Side By Side
Capacity (L) 277
Adjustable door Yes
Energy Efficiency
Certification GS
Available Color Options  White White

Anti BacterialHigh QualityReversable Door

 

 

Overview

Main Features
Mechanical Temperature Control
Broad Climate (T/ST/N)
Low Noise
Reversible Door
Adjustable Legs
No frost
Transparent Drawers
High efficient compressor
Fast freezing
Easy rolling wheels
CFC free
Alarm
Hinge Metal
Handle Design
Side handle
 

Technical Specs

Net Capacity  
Total (L/cu.ft) 188L / 6.5ft
Freezer (L/cu.ft) 188L / 6.5ft
 
General Features  
Temp. Control/Display Mechanical
Defrosting No frost
Refrigerant R600a
Power (V~/Hz) 220~240/50Hz
Climate Type N/ST/T
Energy Efficiency A+
Certification GS

 

Freezer Compartment  
Star Rating 4
Drawer (s) 1Flap+4 Drarwers
Shelf (Material/NO.) Wire
Door Basket (Material/NO.) Rounded

 

Product Dimensions & Loadability  
Net (W*D*H)(MM) 550 * 583 * 1685
Packing (W*D*H)(MM) 575 * 595 * 1740
Weight (Net / Gross)(KG) 55/60
   

Energy Guide

Frequently Asked Questions

Analysis of Trouble The leakage of refrigerant in the system will result in an insufficient refrigerating capacity ,the resulting phenomena are its lower gas suction pressure and exhaust pressure as well as higher exhaust gas temperature.The exhaust tube feels rather hot ,and a continuous gas flowing sound louder than usual can be heard at the outlet of the capillary ,and no frost or a smaller quantity of loose frost appears on the
evaporator .After shut down ,the balance pressure in the system is usually lower than the saturation pressure corresponding to the same ambient temperature . Remedy In case there is leakage of refrigerant from the system ,do not hurry to recharge it with refrigerant ,manage to find out leak points immediately ,and make a note of from where it leaks ---welding points and parts .After having them repaired ,recharge refrigerant . There are so surfaces in a refrigerator ,accordingly ,quite a lot potential leak points do exist in the system .In troubleshooting ,pay attention to those parts that are liable to leak ,check main connection points for oil seepage and tubing for cracks .If there is no severer leak point ,charge the system with nitrogen and detect leak points with the commonly adopted method ,repair them ,evacuate ,charge the system with refrigerant ,and then turn on the refrigerator to make a test run .

Analysis of Trouble

a) In case the amount of refrigerant charged into the system exceeds its nominal capacity ,the superfluous refrigerant will of course take some space of the evaporator ,thus reducing its heat-dissipation area and hencethe refrigerating efficiency of the system .The abnormal phenomena caused by this reason are as follows :the gas suction and exhaust pressures are generally higher than their respective normal values ,the temperature of its condenser is higher and the electric current of the compressor rises ,loose frost forms on the evaporator ,the refrigerator temperature drops slowly ,and frost appears on the gas return tube .

 

b) In case excessive refrigerant has been charged ,the liquid refrigerant that cannot evaporates in the evaporator will return to the compressor ,and thus a phenomenon of «liquid striking» will occur .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 fill all over 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 ,and several minutes later ,open the refrigerant charging tube and et the refrigerant escape from it ,replace the dry filter ,recharge refrigerant after evacuating ,and then seal the charging port .

Analysis of Trouble Residual air in the refrigerating system will reduce its refrigerating efficiency .The prominent phenomena are the increase in its gas suction and exhaust pressures (however ,the gas exhaust pressure will not exceed its rated value ),obvious increase in temperature in the segment from the compressor outlet to the condenser inlet .Because there is air in the system ,both the gas exhaust pressure and temperature will rise ,and moreover ,the gas flowing sound is intermittent and obviously louder . Remedy After shut down for several minutes ,open the tubing ,evacuate it and then recharge the system with refrigerant .

 

Analysis of Trouble Low efficiency of a refrigerating compressor refers to the actual reduction of gas discharge capacity ,and hence the corresponding reduction of refrigerating capacity ,under the condition that the refrigerant in the system is unchanged .This phenomenon occurs mostly when the compressor has been used for quite a long time ,its moving parts have worn to a considerable degree ,fit clearance between various parts have increased and sealing property of its gas valve has deteriorated ,resulting in an decrease in its actual gas discharge capacity . Methods of Judgment 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 ,feel it if there is pressure at the discharge port with your finger (For a normal compressor ,its discharge port is difficult to be blocked with your finger if you just apply a little effort).

 

Analysis of Trouble If a direct cooling refrigerator is to be used for a prolonged period of time ,be sure to 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 drop down to the prescribed range . Remedy Turn the refrigerator off ,and make preparations for defrosting ,open the refrigerator door to let the air come in ,or use a fan to speed up air flowing so as to shorten the time needed for defrosting .Never strike the frost layer with any iron tools or wood stick in order to avoid damage to the evaporator tubing .

Analysis of Trouble During the process of refrigerating cycles ,a little refrigerating oil may remain in the evaporator tubing ,and after a longer time of operation ,if there is considerable refrigerating oil left in the evaporator ,the heat conduction effect will be severely affected ,thus causing a poor refrigerating effect . Remedy It is quite difficult to determine whether this trouble is caused by the refrigerating oil left in the evaporator tubing ,because this kind of phenomenon and other several trouble are tends to be confused .Generally speaking ,you can make a judgment based on the frost formed on the evaporator .If the frost does not cover the evaporator , and moreover ,it is loosely formed ,you can make a judgment that the deterioration of refrigerating effect isdue to the accumulation of refrigerating oil left in the evaporator tubing in case no other troubles have been found . To clear off refrigerating oil left in the evaporator ,dismantle the evaporator ,purge it thoroughly and then dry it .In case it is difficult to dismantle it ,charge refrigerant from the evaporator inlet to wash it several times ,then purge and dry it with nitrogen .

 

Analysis of Trouble Because the refrigerating system was originally not purged thoroughly ,some of the filter screen meshes have been clogged by dirt accumulated in the filter after using it for a certain time of period ,thus resulting in a decrease in flow rate ,and hence a poorer refrigerating effect . The abnormal phenomena caused by this kind of slight clogging in the system are as follows: the gas discharge pressure is lower ,the temperature of discharged gas drops down ,the position clogged has a temperature lower than that in normal conditions ,and for a severe clogging ,even dew condensation as frosting may appear . Remedy Purge the tubing ,and after replacing the dry filter with a new one or clearing it thoroughly ,recharge the system with refrigerant and seal the charging port .

 

a) Clogged with Ice

Analysis of Trouble The dryness treatment for the major parts in the refrigerating system has been performed improperly, the effect of air purging for the whole system is not good ,or the water content in the refrigerant is out of standard ,all these will cause the expansion valve to be clogged with ice .The symptom for this trouble are as follows :the refrigerator sometimes can refrigerate and sometimes cannot :the refrigerator compartment works normally at the beginning ,but after working for a certain period of time ,frosting begins at the clogged position ,evaporation temperature reaches below 0°C , water will accumulate at the narrow part of the capillary and clog it gradually ,then frost begins to melt at the evaporator ,no gas flowing sound can be heard ,and the gas suction pressure assumes a state of vacuum .Note that these phenomena will appear intermittently ; sometimes ,the refrigerator works well ,and sometimes not well .In order to determine whether it is clogged with ice ,heat the suspicious points with hot water to make ice melt ,and after a while if a gas flowing sound resulting from an abrupt gush is heard and the gas suction pressure rises as well ,itcan be confirmed that the trouble is caused by ice clogging . Remedy If there is too much moisture in the refrigerating system,

it is advisable to release the refrigerant, purge the tubing with nitrogen, and then charge the system with the filtered refrigerant. However, the commonly adopted method is to connect a filter with moisture absorbers (such as silica-gel, anhydrous calcium chloride) to the refrigerating system so as to filter out the moisture from the system, then replace the filter, evacuate it again and finally charge the system with refrigerant.

 

b) Clogged with dirt in capillary

Analysis of Trouble The capillary inlet is a place where coarse-grained dirt or refrigerant oil in the system will tend to settle down and clog it. In case considerable dirt accumulates there, the whole filter screen may be blocked totally, making the refrigerant unable to go through. Clogging with dirt exhibits the same symptoms as that with ice, namely, higher gas suction pressure, lower temperature of discharged gas, and no gas flowing sound from the evaporator. The difference between the both is as follows: if the clogging is caused by dirt , tapping the suspicious clogged point (generally in the capillary or the connection joint of the filter) may cause the refrigerant to flow through partially, resulting in some corresponding change, whereas in that case if you heat it with a hot towel, no reaction will happen, no flowing sound can be heard, moreover, there is no periodic change. After rejecting the possibility of ice clogging, it can be generally considered as the clogging due to dirt . Remedy Dismantle the system, remove the dry filter from it, purge the tubing with nitrogen, install a new filter, then evacuate it and finally charge it with refrigerant.

 

C) Clogging in filter

Analysis of Trouble Total clogging of a filter is rarely to occur. This trouble is mostly caused by the paste-like matter formed from the substances filled into the system or other dust after the refrigerator has been used for a longer time, or by the dirt accumulated gradually inside the filter. Sometimes, tapping the filter nay cause a passage for flowing, Touching it with your hand, you will feel that it is cooler compared with its temperature in the normal state. Remedy

The same as described in the capillary clogging with dirt.

 

a) Breakage of gas suction and discharge valve blocks

Analysis of Trouble The compressor works by means of the opening and closing of gas suction valve and discharge valve to suck and discharge the refrigerant. If the valve block is broken, the refrigerant can not be discharged, and hence no refrigerating can be achieved. Method for making judgement It is quite difficult to differentiate this trouble from others because they often have similar symptoms. In repairing, firstly, hear attentively if there is some abnormal sound coming from the compressor (sometimes , the broken pieces of valve block may strike against the cylinder), and feel the compressor casing with your hand to ascertain whether it is too hot, this is also helpful to the troubleshooting; secondly, measure the pressures at the high and low pressure ports of the compressor with pressure gauges, if thegas suction valve block is broken, the suction pressure gauge pointer will swing violently and the suction pressure is very high, whereas when the gas discharge valve block is broken , the discharge pressure gauge pointer will swing drastically and the discharge pressure is very high. In the both cases, stop the compressor at once, and if technique is available, open the cylinder cover and check up the valve block, repair it, or replace it with a new one,

 

C. Sudden stop of Compressor during Its Running The cause of sudden stop of a compressor during its running is mostly that the gas suction pressure and/or discharge pressure exceed their respective prescribed ranges, thus making a pressure-operated protective relay shut off the power to the compressor and stop it. In the following we discuss mainly the reasons for causing excessively high gas discharge pressure and low suction pressure.

 

A) Too much refrigerant charged into the system Analysis of Trouble The phenomenon, such as loose frosting and poor refrigerating effect, may occur if excessive refrigerant has been charged into the system. Superfluous refrigerant will occupy a certain space of the evaporator, thus reduce its heat dissipating area, and the phenomenon of «liquid striking» may occur, too. Meanwhile, dew or frost condensation may occur on the gas return tube, and the gas discharge pressure will obviously rise, when it reaches the threshold value, the protective relay will actuate and shut off the power supply to the compressor. Remedy Open the tubing, re-evacuate and then charge the system with a proper quantity of refrigerant.

 

B) Air left in the system Analysis of Trouble The residual air in the system will circulate together with the refrigerant in the system. The major symptoms caused by this residual air is higher gas discharge pressure, higher discharged gas temperature (the gas discharge tubing is considerably hot when you feel it with your hand), and poorer refrigerating effect. Furthermore, the gas discharge pressure will exceed its normal value when the compressor has run for a period not too long, thus making the protective relay actuate and bring to a stoppage. Remedy Check up how the air has been left in the refrigerating system. Generally, there are two possibilities: one is that the air has been sucked into the system when repairing due to carelessness, or it has not been purged out totally when evacuating the system; the other is that there are leak points at the low pressure end of the refrigerating system. Leak points appear mostly in those low temperature parts or assemblies, because the evaporation temperature is lower for such low temperature devices, especially at the low pressure end, it is easier for the air goes into the system. Once it has been ascertained that air does exist in the system, you have to open the tubing, re-evacuate it and then charge it with refrigerant.

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    Freezer Located on a small label below the rating label on the back of the unit
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