[What to do when the chiller encounters a high-pressure fault] We know that while the compressor is running at high speed, the temperature will rise, and the compressor will generate high pressure, which will cause the high-pressure protection relay to operate. The discharge pressure of the compressor reflects the condensing pressure. The normal value should be 1.3 ~ 1.7MPa, and the protection value of the Toyo chiller is set to 2.1MPa. Then, if it is operated for a long time, the compressor pressure is too high, it will cause the compressor running current to be too large, it is easy to burn the motor, and it is easy to cause the compressor exhaust valve plate to be damaged. 冷水机 产生高压故障的原因如下： Specific analysis of specific problems, according to the analysis of the editor of Toyo, the reasons for the high-pressure failure of the chiller are as follows:
A The condenser is dirty or blocked. The cold water is generally tap water, and it is easy to scale when it is above 30 ° C, and because the cooling tower is open, directly exposed to the air, dust and foreign matter can easily enter the system, causing the condenser to block. The unit should be backwashed regularly and chemically cleaned and descaled if necessary
B The cooling water flow is insufficient and cannot reach the predetermined water flow. Mainly manifested in that the pressure difference between the inlet and outlet of the unit becomes smaller and the temperature difference becomes larger. The reason for insufficient flow is that the system is short of water or air. The solution is to install an exhaust valve at a high place in the pipeline for exhausting; the pipeline filter is blocked or selected too thin and the water permeability is limited. You should choose a suitable filter and regularly Clean the filters.
C. The temperature of the cooling water is too high, and the condensation effect is poor. 组要求的冷却水额定工况在28~35℃，水温高，散热不良，必然导致冷凝压力高，这种现象往往发生在夏季。 The rated working condition of the cooling water required by the chiller is 28 ~ 35 ° C. High water temperature and poor heat dissipation will inevitably lead to high condensation pressure. This phenomenon often occurs in summer. So what are the causes of high water temperature? 1. The cooling tower is faulty, such as the fan is not turned on or even reversed, and the water distributor does not turn. The temperature of the cooling water is high and it rises rapidly; Should be the main reason
D Refrigerant is too much. Non-condensable gases such as air and nitrogen are mixed in it. This situation usually occurs after maintenance, and the vacuum is not complete. Can only be drained, re-evacuated and refilled with refrigerant.
E. False alarm caused by electrical fault. Because the high-voltage protection relay is wet, bad contact, or damaged, the unit electronic board is wet or damaged, and a communication failure causes a false alarm. This kind of false fault, often the HP fault indicator on the electronic board is not lit or dim, manual reset of the high-voltage protection relay is invalid, and the computer displays "disappears automatically." It is tested that the compressor running current is normal, and the suction and discharge pressure is also normal.
If you have more related questions, you can visit the official website of Toyo or call our professional technicians at 15012699306 0755-84877928, we will answer your questions in detail.