Midea Air Conditioner KFR-51LW-BP2DN1Y-DA400(B3)

10/23/2025

Why Refrigeration System Clogged

The blockages in the refrigeration system include ice, dust, oil and welding blockage, etc.

07/31/2020

Air conditioner compressor failure Be sure to find out the underlying cause of the compressor failure!

The compressor is the energy core of the air-conditioning refrigeration (heating) system. In the refrigeration system, it mainly plays the role of compressing refrigerant and promoting the continuous circulation of refrigerating oil.

06/21/2020

Common system failures of refrigeration equipment

Common system failures of refrigeration equipment 1. Liquid return: For refrigeration systems using expansion valves, liquid return is closely related to the selection and use of expansion valves. Expansion valve selection is too large, the superheat setting is too small, the installation method of the temperature sensor is incorrect, the insulation bandage is damaged, and the expansion valve failure may cause liquid return.<img src="{{media url=&quot;Common_system_failures_of_refrigeration_equipment2.png&quot;}}" alt="" />

06/14/2020

Common faults and troubleshooting methods of refrigeration compressors

The compressor is the "heart" of the refrigeration system. The compressor sucks low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and then discharges the high-tempe器2䀀
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06/20/2020

Working principle of scroll compressor_Characteristics of scroll compressor

Working principle of scroll compressor <img src="{{media url=&quot;Working_principle_of_scroll_compressor_Characteristics_of_scroll_compressor.jpg&quot;}}" alt="" /> 　　 Scroll compressor is a kind of positive displacement compression compressor, the compression part is composed of movable scroll and static scroll. This includes many structural features that divert the flow of gas through the compressor housing to reduce entrained oil.

06/14/2020

[Maintenance case] BMW 520Li compressor clutch failure

[Maintenance case] BMW 520Li compressor clutch failure Model: F18. Driving mileage: 3000km. Fault phenomenon: The user reports that the vehicle's air conditioning system is faulty. Sometimes, the cooling effect of the air conditioner suddenly fails器2䀀
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08/21/2020

Thermal expansion valve adjustment skills and maintenance operation methods

1. Adjustment skills and taboos of thermal expansion valve 　　 In order for the thermal expansion valve to perform the automatic adjustment function under one of the working conditions,

09/11/2020

Summary Essentials of water treatment for central air-conditioning chillers

Looking at the management of central air-conditioning throughout the country, it is found that very few are well managed, and all have problems of one kind or another to varying degrees. The main problems are described as follows: 1. Problems caused by the unreasonable design of the design department

08/09/2020

Can you answer these common basic knowledge questions about refrigeration compressors?

1. Why should the compressor run continuously for at least 5 minutes, and stop for at least 3 minutes after shutting down before restarting?

06/29/2020

How the compressor works