Before confirming the problem, self troubleshoot and solve the problem

When the water heater appears in the room, please cut off the new power supply for three minutes first, and check if the two high power sources B are working properly

Panel does not display; Loose or disconnected wiring, rehabilitation power supply, power outage or power outage. Use other circuits to try connecting the reference line

There is a display that shows that there is no self heating, no water ingress, and no viewing of the display screen. The correct setting for the operation time period is to turn on or off the machine within the operation time

Heating does not rise, electric heating tube is damaged | The electric heating wire inside the electric heating tube is disconnected and replaced by the electric heating tube temperature sensor | The relay has no output | Measuring the relay output with a square meter | Replacing the control panel

Long term absence of water intake and interruption of water supply. Does other faucets discharge water? Rehabilitation water supply. Inlet solenoid valve does not work. The solenoid valve coil is disconnected and replaced. The water circuit is blocked. Check for water circuit dredging

Long time no water ingress control solenoid valve | Multimeter measurement electric negative control version relay no output magnetic valve relay water pressure too high | Measuring water pressure above 0.4MPa | Lowering water pressure or adding pressure reducing valve

Continuous overflow; The water level connection line is disconnected, check the relevant line rehabilitation connection

The solenoid valve body is blocked | When the water heater is closed, it also overflows. Replace the solenoid valve (valve body) with a temperature sensor for temperature sensing

The water temperature display is incorrect and not in place. The head should be at the bottom. | Push the display into place to check for water vapor. | Visually check for transpiration or replace the display

Internal water leakage visual inspection, repair or replacement of related accessories, rice leakage daily inspection, repair or replacement of water tank

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