The use of the fully automatic high-pressure cleaning machine, the volume of the high-pressure pump, the frequency of maintenance, and the standardization of operation all affect its normal operation. Most faults in high-pressure cleaning machines occur during use, so to avoid the root cause of the fault, it is necessary to adhere to standardized operation during the operation of high-pressure cleaning machine equipment and monitor its operation at any time to prevent the high-pressure automatic cleaning machine from being unable to find the cause of the fault on-site. Generally, if there is a malfunction in the automatic high-pressure cleaning machine equipment, the reasons should be analyzed from the water supply, power end, and hydraulic end.

1，供水主要是从供水压力、流量等情况分析。足够的供水压力和流量可以避免高压清洗泵液力端内出现负压抽空、气泡爆裂、气蚀阀口的状态，从而使高压泵的阀片和阀座的寿命得到保证。压力主要是观测压力表，观察设备的压力表是否是设备设定的额定压力。

1. Water supply is mainly analyzed based on water supply pressure, flow rate, and other factors. Adequate water supply pressure and flow rate can prevent negative pressure evacuation, bubble bursting, and cavitation of the valve port in the hydraulic end of the high-pressure cleaning pump, thereby ensuring the service life of the valve disc and valve seat of the high-pressure pump. The pressure mainly refers to observing the pressure gauge, observing whether the pressure gauge of the equipment is the rated pressure set by the equipment.

观测流量是否足够时要在高压清洗泵工作转速下检测，因为有时候供水流量略有不足，清洗泵的转速比较低情况下会出现假性流量充足，高压清洗机在这种状态下工作会对高压泵造成非常严重的伤害。

When observing whether the flow rate is sufficient, it should be tested at the working speed of the high-pressure cleaning pump, because sometimes the water supply flow rate is slightly insufficient, and when the cleaning pump speed is relatively low, there may be a false sufficient flow rate. Working in this state of the high-pressure cleaning machine can cause very serious damage to the high-pressure pump.

一般来说引起供水流量不足的原因有两种，一种是供水中杂质比较多，没有按照规定经常清洗进水滤网，供水杂质仅会堵塞过滤器、硌伤阀口，阀片使高压清洗泵的阀座寿命大大降低。同时还会出现假性供水不足、泵组抖动的现象。另一种原因是地区性供水压力不足不稳定影响供水。

Generally speaking, there are two reasons for insufficient water supply flow. One is that there are many impurities in the water supply, and the inlet filter screen is not cleaned regularly according to regulations. Impurities in the water supply only block the filter and damage the valve port. The valve plate greatly reduces the service life of the high-pressure cleaning pump seat. At the same time, there may also be false water shortage and pump group shaking. Another reason is the insufficient and unstable regional water supply pressure, which affects water supply.

2，动力端主要是检查高压清洗泵的转速、主轴承、曲轴轴承、油冷器的温度、高压泵润滑油的油量、质量（是否按要求更换），密封垫，设备的振幅等。

2. The power end mainly checks the speed of the high-pressure cleaning pump, the temperature of the main bearings, crankshaft bearings, oil coolers, the amount and quality of the high-pressure pump lubricating oil (whether it is replaced as required), the sealing gasket, and the amplitude of the equipment.

3，液力端主要检查进排液阀、调压阀、阀芯阀座等。进排液阀如果关闭不严或者调压密封出现故障会造成供水内漏，流量减小，压力下降。阀芯阀座如果损坏关闭不严也会造成溢流口泄水，压力下降。

3. The hydraulic end mainly checks the inlet and outlet valves, pressure regulating valves, valve core valve seats, etc. If the inlet and outlet valves are not tightly closed or if the pressure regulating seal fails, it will cause internal leakage in the water supply, decrease the flow rate, and decrease the pressure. If the valve core and valve seat are damaged and not tightly closed, it can also cause water leakage at the overflow port and a decrease in pressure.