What Is The Reason for The High Pressure Fault of The Compressor？

What is the reason for the high pressure fault of the compressor？

1. Excessive refrigerant charging. This situation usually occurs after maintenance, manifested as high suction and exhaust pressure, balance pressure, and high operating current of the compressor.

Solution: The refrigerant should be discharged under rated operating conditions based on the suction and exhaust pressure, equilibrium pressure, and operating current until normal.

2.The cooling water temperature is too high and the condensation effect is poor. The rated operating condition of the cooling water required by the chiller unit is between 30~35 ℃. High water temperature and poor heat dissipation will inevitably lead to high condensation pressure, which often occurs during high temperature seasons.

Solution: The cause of high water temperature may be a cooling tower malfunction, such as the fan not turning on or even reversing, the water distributor not turning, resulting in high and rapidly increasing cooling water temperature; The external temperature is high, the waterway is short, and the amount of recyclable water is small. In this situation, the cooling water temperature is generally maintained at a high level, and the solution can be to increase the water storage tank.

3. The cooling water flow rate is insufficient and cannot reach the rated water flow rate. The main manifestation is that the pressure difference between the inlet and outlet of the unit decreases (compared to the pressure difference at the beginning of the system's operation), and the temperature difference increases.

Solution: If the pipeline filter is clogged or too fine, the permeability is limited. Suitable filters should be selected and the filter screen should be cleaned regularly; Or choose a smaller water pump that is not compatible with the system.

4. The condenser is scaled or blocked. Condensed water is generally made from tap water, which is prone to scaling at temperatures above 30 ℃. Additionally, due to the open design of the cooling tower and direct exposure to air, dust and foreign objects can easily enter the cooling water system, causing blockages in the condenser, small heat exchange area, low efficiency, and affecting water flow rate. The manifestation is that the pressure and temperature difference between the inlet and outlet water of the He Hui unit have increased, and the temperature of the condenser is very high when touched by hand. The copper pipe for the condenser outlet is hot to the touch.

Solution: Regularly backwash the unit and perform chemical cleaning and descaling if necessary.

5. False alarms caused by electrical faults. Due to moisture, poor contact, or damage to high-voltage protection relays, as well as moisture or damage to unit electronic boards, communication failures can cause false alarms.

Solution: This type of false fault often causes the HP fault indicator light on the electronic board to not light up or light up slightly, the manual reset of the high-voltage protection relay to be ineffective, the compressor's operating current to be normal, and the suction and exhaust pressures to be normal.