Maintenance Service and Trouble Shooting

refrigerating effect is due 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 .

7)Flowing obstructed in refrigerating system 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 .

B.No Refrigerating

The phenomenon that the compressor runs normally ,but no frost (or only a little frost ) appears on the evaporator ,and the refrigerator temperature does not drop down is called “no refrigerating”. There are many causes for this trouble and it is relatively complicated , too . In servicing ,special attention to finding direct causes for this phenomenon .Three main potential causes for this trouble are analyzed below :

1)All refrigerant in the system has leaked out Analysis of Trouble

Leak points in the refrigerating system have not been found and

repaired timely ,thus resulting in the total escape of refrigerant .There are two kinds of leakage :I) slow leakage for instance ,when we want to use a refrigerator that has been put out of quite a long time ,we find the leakage of refrigerant ,or in the course of its operation ,we have found that the refrigerator is gradually becoming not so cold and finally no refrigerating cab be achieved ; ii) fast leakage in that case ,all the refrigerant will escape swiftly due to abrupt rupture of system tubing .

Symptoms of total leakage of refrigerant are mainly as follows : the compressor can be started easily (if there is no damage to the compressor parts) and its operating current becomes low ,its gas suction pressure is high and discharge pressure is lower ,the gas discharge tube feels rather cold ,no sound of gas eruption from the liquid in the evaporator can be

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Haier HRF- 349AA, HRF- 329AA, HRF- 369AA service manual No Refrigerating
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HRF- 369AA, HRF- 329AA, HRF- 349AA specifications

The Haier HRF-349AA, HRF-329AA, and HRF-369AA are modern refrigerators designed to enhance the kitchen experience with their innovative features and technologies. Each model offers a blend of functionality, energy efficiency, and stylish design, making them appealing choices for homeowners.

The Haier HRF-349AA is known for its spacious interior and superior cooling performance. With a total capacity of 349 liters, it provides ample space for food storage. One of its standout features is the No Frost technology, which prevents ice buildup and eliminates the need for manual defrosting. This ensures that both the refrigerator and freezer compartments maintain optimal temperatures, preserving the freshness of food items. The model is also equipped with an energy-efficient compressor, which optimizes power consumption while maintaining efficient cooling.

Next is the Haier HRF-329AA, a slightly smaller model that does not compromise on features. With a capacity of 329 liters, it is ideal for families or individuals looking for a reliable cooling solution. This refrigerator incorporates Multi Air Flow technology, which ensures that cold air circulates evenly throughout the compartments. This feature helps to keep food fresh for longer periods. Additionally, the HRF-329AA features adjustable shelves, allowing users to customize storage space according to their needs.

The Haier HRF-369AA takes things a step further, offering a total capacity of 369 liters, making it one of the larger options in the lineup. This model includes smart cooling technology, which monitors temperature and humidity levels, automatically adjusting them to maintain an optimal environment for food storage. One of its key characteristics is the Eco-friendly Refrigerant, which not only contributes to a reduced carbon footprint but also ensures effective cooling performance. The HRF-369AA also comes with a stylish exterior, available in various finishes to complement any kitchen decor.

All three models reflect Haier's commitment to quality and innovation. Their design incorporates features such as LED lighting for better visibility and easy access to food items, as well as sleek finishes that enhance the aesthetic appeal of any kitchen. With energy-efficient operations and advanced cooling technologies, the Haier HRF series delivers performance and reliability that meets the demands of modern households.
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