Danfoss Compressor SH620B7ALF

04/09/2022

Where is the Expansion Valve Located?

Expansion valve, also known as Throttle valve, is an important automatic control component of refrigeration system. It is generally installed between liquid reservoir and evaporator.

01/03/2021

How do I know if it is a fake or an original Danfoss Cold Control 077B I have in my hand?

Cold Controls (thermostats) are subject to the LVD directives, meaning they must be tested according to this Directive so that customers can feel safe and secure during buying and installing these Cold Controls. Danfoss Cold Controls also called 077B to器2䀀
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08/07/2020

How to troubleshoot the icing of the evaporator of the air conditioner

Small split air conditioners often have icing on the indoor unit evaporator in summer. Why does it freeze and how to eliminate it? Here are the following:<br></br> 　　 1. Insufficient refrigerant<br></br>

01/11/2023

What is a Directional Control Valve?

Hydraulic valves are used to control the flow direction or adjust the flow and pressure of liquids (oil, water, or air) in hydraulic systems.

10/28/2025

Causes, treatment and prevention of liquid shock in refrigeration compressor

Causes, treatment and prevention of liquid shock in refrigeration compressor Liquid shock refers to the situation where the refrigerant fails to absorb heat or evaporates sufficiently, and the refrigerant liquid or wet steam is sucked into the compressor器2䀀
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04/04/2023

AC Compressor Failure and Case Analysis

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

06/29/2020

Suggestions for troubleshooting of compressor with liquid start

07/30/2020

What should I do before the air conditioner is turned on for the first time when I encounter the new crown virus in summer?

In a live broadcast last night, Dr. Zhang Wenhong stated that China’s epidemic prevention and control has done a good job. When people wear masks, the probability of contracting the new crown virus is very small.

08/17/2020

The setting of fire damper in HVAC system

In the HVAC design, there are many types of valves for fire prevention and smoke exhaust, and the valve settings are different for different applications.

01/15/2021

dafoss low-pressure

Differential setting on low pressure control too low. Solution: Area Low pressure System Part Compressor Symptom Compressor running time too short Potential Cause Differential setting on low pressure contol too low. Solution Increase the differ器2䀀