1. Hot water circulation pump failure reasons:
1). Import and export of the valve is not open, import and export pipeline obstruction, abortion impeller blocking. Solution to remove obstruction.
2). Motor running direction is wrong, the motor phase speed is slow. Adjust motor direction, strong motor connection.
3). Suction pipe leakage. Tighten the cover and remove the air.
4). The pump is not filled with liquid, the pump cavity has air. Open the pump cover or open the exhaust valve, exhaust air.
5). Import and export of water shortage, high suction valve, Water Leakage. Stop check and adjust (the connection of the water pipe and the use of the suction process is prone to this phenomenon).
6). The pipeline resistance is too large, improper selection of centrifugal pump. Reduce the curve of the pipeline, re select the pump
2. Hot water pump failure flow problem
1). Import and export of the valve is not open, import and export pipeline obstruction, abortion impeller blocking. Solution to remove obstruction.
2). Pipe, impeller partial obstruction, scale deposition, the valve opening is insufficient. Removal of obstruction, re adjust the valve opening.
3). The voltage is low. Voltage stabilized
4). Impeller wear. Replace impeller.
5). The use of more than the rated flow. Regulating flow off small outlet valve
6). Suction process is too high. Reduce the suction process. 7, pump bearing wear. Replace bearing.
3. Hot water circulation pump fault noise vibration reasons
1). The pipeline support is not stable. Solid line.
2). Liquid mixed with gas. Improved suction pressure exhaust.
3). Resulting in cavitation. Vacuum reduction.
4). Bearing damage. Replace bearing.
5). Motor overload heating operation. Regulating flow off small outlet valve.
4. Hot water circulation pump fault motor heating reasons
1). Traffic is too large, overload operation. Close small outlet valve
2). Rub. Check exclusion. 3, motor bearing damage. Replace bearing. 4, the voltage is insufficient. Voltage regulator.
5. Hot water circulation pump leakage reason
1). Mechanical seal wear. Replacement.
2). Pump body with sand holes or broken. Welding repair or replacement.
3). Sealing surface is not smooth. Dressing.
4). The installation of bolt loose. Fastening。
