The troubleshooting methods for low suction pressure of chiller mainly include the following steps:
Check and fully open the condenser refrigerant liquid outlet valve
If the valve is not fully opened, the flow of refrigerant is restricted, resulting in a decrease in suction pressure.
Clean or replace the refrigerant filter. If the filter is clogged, it will affect the flow of refrigerant, so it is necessary to clean or replace the filter regularly.
Check and adjust the expansion valve. If the expansion valve is not adjusted properly or malfunctions, it can also cause the suction pressure to be too low. In this case, the expansion valve needs to be readjusted or replaced.
If the refrigerant is not filled sufficiently, it should be replenished to the specified amount
Insufficient refrigerant can lead to a decrease in the cooling effect, which in turn leads to a decrease in the suction pressure.
If the inlet water temperature of the evaporator is too low or the amount of water passing through the evaporator is insufficient, the inlet water temperature should be increased appropriately
and the pump and water valve should be checked
These problems can also lead to a decrease in inspiratory pressure.
Inspect and clean up debris or dust on the outside of the condenser
These debris and dust can affect the heat dissipation of the condenser and, in turn, the suction pressure.
In addition, it is also necessary to pay attention to the problem of excessive lubricating oil circulating in the chiller cooling system, and if this happens, the cause should be identified and
reduced to an appropriate value
If the quality of the cooling water used is poor, clean the cooling water pipe at least once a year to remove scale and other dirt in the pipe and prevent the pipe from clogging.
After completing the above steps, if the problem is still not resolved, it may be necessary to replace the compressor or perform other more in-depth inspections and repairs. Please note that the above operations should be carried out by professionals to avoid possible further damage or safety issues to the equipment.
