What do the fault codes of air-cooled chillers mean

Generally, people will see 2 areas on the control panel of the device, namely PV area and SV area. The first one expresses the specific temperature, and the latter one is for setting the temperature. When a fault occurs, PV displays the number of the information fault and SV displays the name of the information fault.

For example, the number of the information fault displayed in the PV area is 1, and the name of the information fault displayed in the SV area is Err01. The reason is maintenance failure of wrong phase, three-phase power failure (suspicion is caused by wrong phase/reverse phase/leakage phase);

When the numbers of the information faults displayed in the PV area are expressed as 2, 3, and 4, the names of the information faults displayed in the SV area are also Err02, Err03, and Err04. The reason is that the No. 2 refrigeration compressor has high pressure, the No. 2 refrigeration compressor has a bottom pressure, and the No. 2 refrigeration compressor is loaded. At this time, the solution is to stop the No. 2 refrigeration compressor;

When the numbers of the information faults displayed in the PV area are expressed as 5, 6, and 7, the names of the information faults displayed in the SV area are also Err05, Err06, and Err07. The reason is the high pressure of the No. 2 refrigeration compressor, the bottom pressure of the No. 2 refrigeration compressor, and the load of the No. 2 refrigeration compressor. At this time, the solution is to stop the No. 2 refrigeration compressor;

The number of the information fault displayed in the PV area is 8, and the name of the information fault displayed in the SV area is Err08. The reason is that the refrigerated centrifugal water pump is too low, and the solution is that the refrigerated pump has insufficient water flow (shutdown group);

The number of the information fault displayed in the PV area is 9, and the name of the information fault displayed in the SV area is Err09. The reason is the load of the refrigerated centrifugal water pump, and the solution is that the load of the refrigerated pump is very large (shutdown group);

The number of the information fault displayed in the PV area is 10, and the name of the information fault displayed in the SV area is Err10. The reason is that the cooling cycle water pressure is too low (the centrifugal fan is over-temperature) and the cooling pump water flow is not enough (all refrigeration compressors and cooling pumps must be disabled, and the refrigeration pump does not need to be stopped);

The number of the information fault displayed in the PV area is 11, and the name of the information fault displayed in the SV area is Err11. The reason is that the refrigeration centrifugal water pump load (centrifugal fan load) and the cooling pump load are very large, (to stop all refrigeration compressors and cooling pumps, the refrigeration pump does not need to be stopped);

The number of the information fault displayed in the PV area is 12, and the name of the information fault displayed in the SV area is Err12. The reason is that the refrigerating temperature is lower than the temperature set by SV (S2), and the group is shut down. In some cases, other fault codes will continue to appear, which is not easy to analyze today.

In the whole process of applying air-cooled chillers, many problems will cause chiller alarms. There are also many methods of alarm, generally light effect alarm, sound alarm and code alarm. According to the different production and manufacturing design schemes of the chiller factory, the types of alarm methods that will be generated for the same problem are different, but whether it is a light effect alarm, a sound or a code alarm, it must be highly valued by customers. The common problem with air-cooled chillers that causes alarms is high-pressure and low-pressure alarms.

There are many reasons for the bottom pressure alarm, which are caused by a large refrigerant charge or related problems. High pressure alarms are mostly caused by problems such as over-temperature and insufficient cooling, including insufficient refrigerant amount or cooling water flow (water-cooled cooling water chiller closed cooling tower and its centrifugal water pump, pipes), refrigerant leaks or pipes Blockages, residues, and dirt will cause the chiller system software to cause problems such as low total flow and slow water flow, which will eventually cause alarms and malfunctions.

The above is the introduction of the relevant content of the editor for the fault code of the air-cooled chiller! If you have any questions or other new questions, you can contact us LNEYA, we will reply you as soon as possible.