The use of the automatic high-pressure washer, the volume of the high-pressure pump, the number of maintenance, and the standardization of operation all affect its normal operation. Most failures of high pressure washers occur in the process of use, so in order to avoid the root cause of the failure, we should adhere to the standard operation when the high pressure washer is working, and monitor its operation at any time to avoid the failure cause of the high pressure automatic washer "after lying down" on the site. In general, if the automatic high-pressure washer equipment fails, the causes shall 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。

1. Water supply is mainly analyzed from water supply pressure, flow, etc.

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。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。

Sufficient water supply pressure and flow can avoid negative pressure evacuation, bubble bursting and cavitation of the valve port in the hydraulic end of the high-pressure cleaning pump, thus ensuring the service life of the valve disc and valve seat of the high-pressure pump. The pressure is mainly to observe the pressure gauge, and observe whether the pressure gauge of the equipment is the rated pressure set by the equipment. When observing whether the flow is sufficient, it should be detected at the working speed of the high-pressure cleaning pump. Because sometimes the water supply flow is slightly insufficient, the false flow will be sufficient when the speed of the cleaning pump is relatively low, and the high-pressure cleaning machine will cause very serious damage to the high-pressure pump when it works in this state.

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 frequently as required. The impurities in the water supply will only block the filter and damage the valve port. The valve plate greatly reduces the service life of the valve seat of the high-pressure cleaning pump. At the same time, false insufficient water supply and pump unit jitter will also occur. Another reason is that regional water supply pressure is insufficient and unstable, 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 bearing, crankshaft bearing, oil cooler, the oil quantity and quality of the high-pressure pump lubricating oil (whether it is replaced as required), the sealing gasket, the amplitude of the equipment, etc.

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 cores and seats. If the inlet and outlet valves are not closed tightly or the pressure regulating seal fails, the water supply will leak, the flow will decrease, and the pressure will drop. If the valve core and valve seat are damaged and not closed tightly, the overflow port will leak and the pressure will drop.