The Cause of a Blockage in the Refrigeration System

There are probably four reasons for the blockage of the refrigeration system:

1. The debris is blocked;

2. Ice block;

3. The solenoid valve is broken;

4. The expansion valve is broken, etc.

1. Clogged by debris

Because the refrigeration system has strict requirements in all links of production and manufacturing, it is necessary to ensure that each link must be cleaned. However, most cold water machine manufacturers currently purchase parts and then assemble them. In this way, it is inevitable that some systems will be impure, which will cause system blockage in severe cases (generally blockages occur in filters or expansion valves). 

Semi-Hermetic Water Cooled Screw Compressor Unit – Top Quality (-20~-15℃)

Therefore, manufacturers of cold water (refrigeration) machines have installed "filters" in the refrigeration system to filter out impurities in the system. When the impurities in the pipes of the refrigeration system accumulate to a certain degree, the filter will be blocked, which will affect the refrigerant throughput of the system. In severe cases, a low-pressure failure will occur.

Recognition: If the filter is clogged due to a dirty system, it will only cause the cooling capacity of the equipment to decrease, and you will not even feel affected. When the "filter" is slightly clogged, there will be a temperature difference between the entrance and exit of the "filter", which can be felt when you hold the entrance and exit with your hand. In severe cases, the filter will appear condensation or frosting. 

Suspect your filter is clogged? Don’t wait until it stops cooling.