Common faults (a): pump is not absorbent, pressure gauge and vacuum gauge pointer violently beating. Failure causes: 1, pump enough water; 2, pipe or instrument leaks. Troubleshooting methods: 1, continue to pump water. 2, tighten the blockage leak. Common Faults (B): Pump does not absorb water, the vacuum gauge shows a high degree of vacuum. Failure causes: 1, the end of the Valve did not open or blocked; 2, the resistance of the suction pipe is too large; 3 absorbent height is too high. Troubleshooting methods; 1, the calibration or replacement of the bottom valve; 2, cleaning or replacement of suction pipes; 3, reducing the height of water absorption; common failures (C): pump water, pressure gauge shows pressure. Fault causes: 1, the outlet pipe resistance is too large; 2, the rotation direction is not correct; 3, night traffic jam; 4, speed is not enough. Troubleshooting methods: 1, reduce or shorten the water outlet pipe; 2, to correct the direction of motor rotation; 3, impeller cleaning; 4, increase speed. Common faults (d): insufficient flow or too low head. Fault causes: 1, the impeller or inlet and outlet pipes blocked; 2, double suction seal ring wear too much, or impeller damage, 3, the speed is lower than the specified value. Troubleshooting methods: 1 clean the impeller or pipe; 2, replace the damaged parts; 3 adjusted to the rated speed. Common Faults (E): The pump consumes too much power. Fault causes: 1 packing pressure is too tight; 2, impeller and double suction seal ring friction; 3, the flow is too large. Troubleshooting methods: 1, loose packing gland; 2, check the reasons to eliminate mechanical friction; 3, reduce the flow. Common faults (f): pump internal sound law field, the pump is not on the water. Fault causes: 1 suction pipe resistance is too large; 2, high water absorption 3, suction out of the air inhalation; 4, the suction liquid temperature is too high; 5, cavitation phenomenon. Troubleshooting methods: clean up the suction pipe and the bottom valve; 2, reducing the height of water absorption; 3, check the bottom valve to reduce the height of water absorption, blockage of air leaks; 4, to reduce the liquid temperature; 5, adjust the outlet valve so that the required performance Range of operation. Common Faults (7): The pump is not normal vibration. Failure causes: 1, pump cavitation; 2, impeller imbalance; 3, the pump shaft and the motor shaft is not the heart; 4, submit the screw loose. Troubleshooting methods: 1, adjust the outlet valve, so that the provisions of the performance within the scope of operation; 2 teach impeller static balance; 3, the correction of pump shaft and motor shaft concentricity; 4, quiet foot screws. Common faults (eight); bearing overheating. Failure causes: 1, there is no oil bearing 2, the pump shaft is not agree with the center line. Troubleshooting methods: 1, plus lubricants; 2 to adjust the two weeks of concentricity and in the same center line, build factories and cleaning the bearing body.
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