1. Check whether there is power failure: if there is power failure, the power supply cannot be connected and the water purifier cannot make water. You must wait until the power supply is restored before turning it on again.
2. Check whether the low-voltage switch is out of order: if the low-voltage switch is out of order, it will display overvoltage, the protection device will start, and the water purifier will automatically stop making water. Only by maintaining the switch can the fault be eliminated.