Maintenance Service and Trouble Shooting

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).

5)Too thick frost layer formed on evaporator 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 .

6)Refrigerating oil left in 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

20

Page 20 Page 22
Page 21
Image 21
Haier HRF- 329AA, HRF- 349AA, HRF- 369AA service manual Maintenance Service and Trouble Shooting
Page 20 Page 22

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.
Top Page Image Contents