About Water Chiller Low Pressure Alarm

When we use the water chiller, we will certainly do some troubleshooting first, and then use it. But in the process of use, there will be a variety of problems need to be solved. Next, let’s talk about the influence of low pressure on the chiller.

Water chiller low pressure alarm

Cooling system leak

There are leaks in the connecting pipes of the cooling system,such as welding point leakage, corrosion leakage, fracture caused by mechanical vibration,and human factors, etc. These will leads to malfunction of low pressure.

Solution: First of all, use leakage detection liquid (soap water, or detergent mixed with water) or halogen leak detector to find the leakage point. After the leakage point is found, repair it with welding equipment,then pressure holding to test leak and vacuum pumping before charging refrigerant according to the manufacturer’s specifications, the chiller can resume normal operation.

Cooling system blockage

A. Blockage By impurities. If the filter is blocked due to dirt, it will only cause the cooling capacity drop slightly, and you may not even feel any affected.When the filter is slightly clogged, there will be a temperature difference of the inlet and outlet of the filter, which can be felt by holding the inlet and outlet with your hand.When it is block seriously, the filter will dew or frost. If there is dew or frost (except the dew after the chiller stop running under normal operation), it can be judged that the filter is block.

Solution: Replace the filter of same model.

B. Ice Blockage. The water in the system runs with the refrigerant to the throttle valve (expansion valve). After throttling expansion, freeze at throttle outlet, thus blocking the throttle valve (expansion valve) and lead to a low-pressure fault.

Solution: Change the filter with same model.

Heating exchange of evaporator is seriously in sufficient

Insufficient water flow in the evaporator. The water pump is broken or something bad enter in to the pump impellers,appear leakage in the water inlet pipes of water pump,(It is difficult to check, needs careful analysis),which are resulting in insufficient water flow.

Solution: Replace water pump. Or disassemble the water pump to clear the bad something in the impellers.

If there is any other problem with the water chiller, please contact us.

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