Industrial chillers in the long run, the compressor may be overheating failure, resulting in compressors can not run, there will be cold water machine failure. In order to understand and solve the compressor overheating fault, the following, the East Star Refrigeration will give you a full range of cold water compressor overheating problems should be addressed.
The compressor motor winding of the compressor is embedded with a thermistor, and the resistance is generally 1k. When the winding is overheated, the resistance will increase rapidly. When the temperature exceeds 141k Omega, the SSM action of the heat protection module will cut off the overheating fault of the compressor. The following reasons are as follows:
First of all, the compressor load is too large, over-current operation. The possible reason is that the cooling water temperature is too high, the refrigerant is filled too much, or there is no condensation gas in the refrigeration system, which results in heavy load on the compressor, and is characterized by over current and accompanied by high voltage faults.
Second, the electric fault causes the compressor of the chiller to run over current. Such as three-phase power supply voltage is too low or three-phase imbalance, lead to current or a phase current is too large; AC contactor damage, contact ablation, resulting in contact current is too large or because of lack of phase and the current is too large.
Third, the overheating protection module of the refrigerator is damaged or damaged by SSM. The intermediate relay is damaged and the contacts are bad. It shows that the overheating fault occurs on the starting of the compressor, and the compressor can not start. If the unit electronic board fault or communication failure, may also report overheating fault.
If the operator meets the compressor overheating failure again, please refer to the above method to solve the problem. In short, we have a full range of industrial cold water compressor overheating problems, response programmes have the above content, we should deep analysis and summary, and constantly master the new content. The operation of the unit shows the overheat fault and the TH fault indicator light is on.
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