Why is the chiller not cooling?

Industrial chillers will inevitably have large and small faults in the daily operation process, and general faults will have alarm prompts. But some will not alarm, so how to determine and eliminate the fault? Today, let me briefly talk about the reasons and solutions for the chiller not cooling. The following method is also applicable when the air conditioner is not cooling.

  1. The unit is too small and the power is not enough

If the new machine you just bought does not cool, or the water temperature does not drop, most of it is due to insufficient cooling capacity of the freezer. At this time, you only need to replace a larger chiller as needed.

Why is the chiller not cooling?

Why is the chiller not cooling?

  1. The condenser has not been cleaned for a long time

The condenser is one of the main components of the refrigeration unit. Most cooling water contains calcium, magnesium ions and acid carbonate. When cooling water flows through the metal surface, carbonates are formed. In addition, the oxygen dissolved in the cooling water can also cause metal corrosion and rust formation. Due to the generation of rust, the heat exchange efficiency of the condenser is reduced, which affects the cooling effect.

  1. The dry filter is clogged

The clogging of the drying filter will affect the heat exchange effect of the condenser, and the cooling effect of the whole machine is not good. Therefore, it is necessary to regularly check and clean the filter. If the clogging is serious, it is recommended to replace the new drying filter.

  1. Excessive impurities in tap water

There are too many impurities in the tap water, which are attached to the inner wall of the water tank and the water pipe, resulting in insufficient water supply, which affects the cooling effect. Therefore, for areas with poor water quality, it is recommended to use stainless steel configuration or regularly clean and replace the water pipe to ensure the normal operation of the chiller.

  1. Insufficient refrigerant (also called refrigerant, freon, refrigerant)

Common snow species are R22, R410a, R407c, R134a, etc. During the operation of the chiller or air conditioner, the liquid refrigerant in the evaporator constantly absorbs the heat in the water and begins to evaporate. After the flow, it turns into low-temperature and low-pressure refrigerant into the evaporator to continue circulation. If the refrigerant is used for too long, it will evaporate, which will affect the cooling effect. At this time, the user only needs to add the refrigerant properly, but the problem of freon leakage and the machine itself caused by improper installation is not ruled out.

  1. The ambient temperature is too high

When the indoor is airtight or in an environment above 40 ° C, it is difficult for the air-cooled chiller or air conditioner to transfer heat to the outdoor, which leads to no refrigeration and even a compressor high-pressure alarm.

  1. The cold water machine is not cleaned and maintained for a long time

After using for a period of time, the ice water unit is easy to absorb dust and debris. If it is not cleaned for a long time, it will affect the heat dissipation performance of the machine. The pipes are also prone to scale, breed bacteria, and reduce the cooling effect.

Insufficient power supply voltage and too long copper pipes connecting the indoor unit and the outdoor unit will also cause the chiller or air conditioner to not cool. In addition, if the actual water temperature has reached the requirements, but the temperature on the display has not decreased, it is likely that the temperature sensor of the chiller is damaged. In this case, you only need to replace the temperature sensor.

In short, there are many reasons why the chiller or air conditioner is not cooling. The above are several common failures. The specific situation needs to be determined by the maintenance personnel according to the actual use of the user.

Geson chiller product range covers Industrial Refrigeration and Commercial Central air-conditioning, including Water-cooled chillers, Air-cooled chillers, Screw chillers, Scroll chillers, Centrifugal chillers, Water(ground) source heat pumps, Air source heat pumps and etc., Capacity from 2tons~4000tons, and temperature from -160℃~30℃, complete full product series for customers.

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