High voltage alarm is one of the frequent faults of the chiller. There are many reasons, but the biggest reason is the reason for the cooling water system. The following is an analysis of the specific reasons and provides a simple solution.
Air Cooled Screw Chiller
This will lead to poor cooling of the condenser, that is, the heat generated within the refrigerant cycle cannot be removed by the fan, and then the temperature and pressure will rise. Just like when we blow the fan in hot weather, if the fan does not turn, we will continue to perspire, which is abnormal in heat and the high-pressure alarm will not occur.
Solution: Check and repair the fan, remove dust and debris around the fan hood, after stopping, clean with compressed air or water gun.
If the condenser is blocked, the high-pressure refrigerant gas in the refrigerant system will condense out of order, resulting in a lot of gas coalescing and high-pressure fault.
Solution: Clean and remove dirt from the condenser. Specific methods to consult manufacturers, guidance.
This kind of reason mostly occurs in the new machine or compressor after maintenance, the refrigeration system mixed with air, resulting in the air can not condense, remain in the condenser, causing pressure rise.
Solution: through the chiller air separation valve, vent, or condenser, do not know how to operate, you can consult the cooler manufacturer.
Excessive refrigerant is similar to the effect caused by entering the air. Too much refrigerant cannot be condensed into a liquid, occupying too much-condensing pipe area, reducing the condensing effect, and increasing the pressure.
Solution: Some refrigerants can be slowly released on the low-pressure side.
The expandable valve is used to throttle the high-pressure liquid refrigerant into a gaseous state. If it is too small, the pressure of the condenser in front will be too high.
Solution: Properly increase the opening of the expansion valve.
The above is the disposal method of the high-pressure fault of the air-cooled chiller, If you want to get more information about good quality chiller, please do not hesitate to ask us.