1. The hot water pump import and export valve is not open, import and export pipeline obstruction, abortion impeller blocking. Solution to remove obstruction.
2. Import and export water shortages, 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).
3. Pumps are not filled with liquid, the pump cavity has air. Open the pump cover or open the exhaust valve, exhaust air.
4. Hot water circulation pump suction pipe leakage. Tighten the cover and remove the air.
5. Motor running direction is wrong, the motor phase speed is slow. Adjust motor direction, strong motor connection.
6. Pipeline resistance is too large, improper selection of centrifugal pump. Reduce the curve of the pipeline, re select the pump.
