2. Open the side cover of the instrument and equipment, and first check whether the connection between the water level gauge and the control circuit is loose.
3. Unscrew the screw cap on the water level gauge with a wrench, take out the water level gauge, and check whether the three probes are rusted. Rust can be removed with alcohol cotton.
4. under the power-on environment, connect the three probes with the steel pipe outside the water level meter in turn, and check whether the water level indicator lamp on the control decorative panel is normal. If the normal release water level gauge is not damaged; Otherwise, check the water level control circuit on the control circuit; After handling the punishment, install the water level gauge, connect the power supply, and add water to check the indicator light.