(1) Water supply is insufficient. At this time, it is necessary to check whether the pressure of the water source is sufficient. Some high-pressure cleaning machines have no self-priming function. At this time, adding a booster pump can solve the problem.

(2) If the water supply filter is blocked, clean the water supply filter.

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The wiring of the three-phase motor is reversed and the two phases are interchanged. First, check the water inlet, including the water inlet pipe and filter, to ensure that there is no blockage. Then remove the high-pressure pipe and connect it after the machine comes out (if the pipe doesn't come out at this time, you can try to connect the tap water first); If the gun is connected to the pipe and the water doesn't come out, just pass the gun head. If the hands-on ability is not good, it is recommended to take it to the store for repair.