1, can not start

    Should first check the power supply: The joint connection is solid; switch contact is close; fuse is blown; equal to three-phase power supply is missing. If open circuit, bad, blown fuse, phase, the reasons should be identified and promptly repaired. Second, check for mechanical failure is the pump itself, the common reasons are: packing too tight or between the impeller and the pump was stuck and blocking debris; shaft, bearing, reducing leakage ring rusted; shaft serious bending. Remedy: relax fill, and clear the flume; open the pump clear debris, rust; remove the shaft correction or replacement of the shaft.

    2, heat pumps

    Cause: Bearing damage; bearing or bracket cover gap is too small; shaft bending or misalignment of two shafts; tape too tight; short of oil or oil well; impeller balance hole on the plug, the impeller out of balance, increased to side of the thrust. Remedy: Replace bearings; remove the back cover, in between the bracket and installation of bearing pads; investigation or adjustment of the pump shaft concentricity of the two axes; due emphasis on loose belt tightness; filling clean butter, butter bearing account 60% of the gap; clear balance of hole blockage.

    3, inadequate flow

    This is because: dynamic speed is not complete or belt slipping, so speed is low; axial blade installation angle is too small; head enough or pipe line is too long a right angle; suction high; end of the valve, piping partial blockage or impeller and impeller defect; outlet leaks seriously. Remedy: Restore the rated speed, removing grease belt, adjust belt tightness; adjusted the blade angle to reduce water pump installation location, shorten the line or change the curvature of the pipeline; seal leak at the pump, compression packing; clear the blockage property, the replacement of the impeller; replaced by leakage ring, plug the leaks.

    4, no water absorption

    The reason is the pump inlet body with air or gas accumulation, or the bottom valve closed, less irrigation water, filling a serious vacuum leak, take the door off a gate or lax. Remedy: First the pressure up, then pump filled with water, and then boot. Also check whether the tight check valve, pipe, fittings without leakage phenomena, such as leaking, painted after the demolition of the joints or blending oil paint, and tighten the screws. Check the water pump shaft seal ring, such as badly worn should be replaced with new parts. Pipe leakage or air leakage. Tighten the nut may be installed failed to exercise stringent. If the leakage is not serious, may leak or the leak of cement coated, or coated with asphalt cement slurry mixing oil. These temporary repairs can be coated or soft soap Shini. If the leakage in the joints, you can use a wrench to tighten the nut, such as severe water must be re-entry, replacing a cracked pipe; reduce the head,the pressure of the pump nozzle into the underwater 0.5m.

    5, severe vibration

    There are several reasons: electric rotor imbalance; coupling with bad; bearing wear bending; rotating parts and loose, broken; pipe support is not strong and other reasons. Respectively to adjust, repair, strengthening, alignment, replacement approach. The situation is caused by a common cause of pump failure, not the whole, the practice of treatment failure, due to the actual analysis, should follow the principle of first in the post outside and must not blind operation.