1. The hot water
pipeline pump import and export valve is not open, import and export pipeline obstruction, the impeller flow channel blocking.
Solution: check valve, remove the resistance.
2. Motor running direction is not right, the motor is short of phase speed is very slow.
Solution: adjust the motor direction, strong motor wiring.
3. Suction pipe leakage.
Solution: tighten the cover, remove the air.
4. The hot water pipeline pump is not filled with liquid, the pump cavity has an air.
Solution: open the pump cover or open the exhaust valve, exhaust air.
5. Imported water supply shortage of suction is too high, at the end of valve leakage.
Solution: stop check, adjust (the grid connected to the water pipe and the use of the suction process is prone to this phenomenon).
Solution: to reduce the pipeline bend, re election pump.
