Troubleshooting Your Smart Water Tank Level Sensor: Common Issues and Fixes

Troubleshooting Your Smart Water Tank Level Sensor: Common Issues and Fixes

Troubleshooting Your Smart Water Tank Level Sensor: Common Issues and Fixes

If your smart water tank level sensor is providing erratic readings, disconnecting from the app, or displaying an error, a simple device reset and sensor check can often resolve the problem. This guide outlines common symptoms and the best troubleshooting steps to try first.

Common Symptoms and Potential Causes

Symptom Possible Causes
Erratic Readings (jumping between 0%, 100%, or other unexpected values) Interference from the tank's water inlet feed (splashing water). Condensation or water droplets on the sensor surface. Obstruction in the sensor's path, such as a float valve. Sensor not installed level, causing echoes off the tank wall.
Device Disconnecting / Entering Pairing Mode A broken or corrupt device configuration, possibly due to a power surge.
Inaccurate Readings (e.g., showing full when tank is 75%) Excessive condensation on the underside of the sensor, potentially leading to water damage. Incorrect installation height or liquid maximum depth settings in the app.
Errors in the App (Err_Sensor or Err_Echo) Err_Sensor is often related to a broken configuration or a faulty sensor. Err_Echo indicates an obstruction or interference in the sensor's path.
Readings Stuck (percentage not updating) A configuration error.

 

Key Troubleshooting Steps

Begin by performing a full device reset and sensor check to rule out configuration or sensor issues.

Steps to Reset the Device (Force New Pairing)
This process will clear the device's current configuration.

  1. Remove the sensor from the tank.
  2. Locate the touch key power button at the bottom of the device.
  3. Press and hold the touch key button for 5 seconds. The button is touch-sensitive, so you will not feel it move; confirmation is visual.
  4. The LED should start flashing rapidly, which indicates that the device is in pairing mode.
  5. Open the Tuya Smart App (or Smart Life app) on your phone and follow the steps to re-add the sensor to your account:
    • Make sure you have Wi-Fi and Bluetooth turned ON on your phone.
    • Click the “+” sign in the top right corner.
    • Select “Add Device”.
    • The sensor should show up as “ME201W Level Sensor”.
    • Configure the sensor's Wi-Fi connection.

 

Steps to Check the Sensor (Post-Reset)
Perform this check before reinstalling the device in the tank to confirm the sensor is functioning correctly.

  1. Hold the device in your hand outside of the tank, pointing it straight down towards the ground with a clear path.
  2. Verify the reading: The level reading on the app should show 0% (or some other low reading, depending on your configuration).
  3. Test Sensor Response: Slowly move the device closer to the ground. The level reading in the app should increase as the distance decreases.
  4. If this test is successful, the sensor itself is working correctly, and the issue is likely related to your installation setup.

 

Installation and Environmental Checks
If the sensor check is successful, review your installation to prevent interference:

  • Check for Obstruction: Ensure there is no float valve or other object (especially near the full level) that could obstruct the sensor's path, causing it to measure the wrong distance.
  • Wipe Down Sensor: Remove the sensor and wipe down the sensing surface to remove any water droplets or condensation.
  • Check for Splashing: If water is fed into the tank from an inlet, splashing water can temporarily affect the sensor readings. Possible solutions include:
    • Installing an elbow fitting with a short downpipe to guide water down.
    • Using a compact float valve.
  • Check Sensor Alignment: The sensor should be installed as level as possible (not pointing slightly to the side wall) to prevent the ultrasonic waves from bouncing off the wall, which can cause an Err_Echo.
  • Check Tank Ventilation: If you notice significant condensation, ensure your tank is well-ventilated to reduce humidity. Severe or chronic condensation can cause water damage.
  • Verify App Settings: Confirm that your Installation Height (distance from sensor to bottom of tank) and Liquid Maximum Depth (full level) settings are correct in the app. Incorrect settings can cause inaccurate percentage calculations.

If you are still experiencing issues after performing these steps, please contact our support team at info@sensibleio.co.za. Based on your thorough testing, we may determine the sensor is faulty and process a replacement unit ASAP.

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