1. The salt used contains too many impurities, so block the salt valve.
2. The electric ball valve cannot be opened normally.
3. The salt in the salt tank of the water softening equipment is clumped, resulting in brine down.
4. Whether the ejector nozzle is blocked by foreign matter.
5. The air check valve fails, closed in advance or blocked.
6. The pipeline between the salt valve and the control valve is blocked and has a large resistance.
