Maintenance Service and Trouble Shooting

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.

1)Stoppage due to excessively high gas discharge 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.

2)

Stoppage due to electric troubles

a)

Thermostat

is out of control

Analysis of Trouble

In

case the

thermostat does not work in its good order or its

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Haier HRF- 349AA, HRF- 329AA, HRF- 369AA service manual Stoppage due to electric troubles
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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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