weighing scale error codes


Weighing machines are indispensable tools in various industries, ensuring precise measurements that impact production quality and safety. However, even the most advanced weighing machines can encounter errors, leading to inaccuracies and potential disruptions in operations.

The Importance of Weighing Machines

Weighing machines, whether used in laboratories, factories, or medical facilities, provide accurate measurements that are often critical for decision-making and quality control. Ensuring that these machines function correctly is vital for productivity and compliance.

The Role of Error Codes

Error codes serve as diagnostic tools that communicate issues within the weighing machine. When an error occurs, the machine displays a specific code that helps operators and technicians identify the problem quickly.

Common Weighing Machine Error Codes

When the scale displays “OL”, “Lo”, or “Err”, there might be something wrong with it. Each error message indicates different issues, please check the error messages below.

Error Display Description Solution
OL Overload. The device will power off Stop using this scale for measurement.
Lo Low battery. The device will power off. Replace all batteries at the same time.
Err(for Smart Scale(T9140), Smart Scale C1(T9146) and Smart Scale P1(T9147) Measurement failure. 1. Step barefoot and keep full contact with the electrodes.

2. Stand still until the measurement on the LED display locks.

FAIL(for P2 series and P3 only) Wi-Fi setup failure. Open the EufyLife app

and follow the on-screen

instructions to reconnect the

scale with your device.

• Move the scale to a place near

your router before the Wi-Fi


• Press and hold the UNIT

button for 10 seconds to

restore factory settings, then

restart the Wi-Fi connection.


Error Code 101: Zero Error

Causes: This error typically occurs when the weighing machine is not properly zeroed before use.

Solutions: To resolve Error Code 101, recalibrate the machine, ensuring it reads zero with no load. Follow the manufacturer’s instructions for zero calibration.

Error Code 202: Overload

Causes: Overloading the weighing platform beyond its capacity triggers this error.

Identifying Overload Situations: Watch for the display showing a weight significantly higher than the machine’s capacity.

Solutions to Prevent Overload: Avoid overloading by checking the machine’s capacity and ensuring loads stay within the limits.

Error Code 303: Calibration Error

Importance of Calibration: Proper calibration is crucial for accurate measurements.

Steps for Calibration: Refer to the manufacturer’s guidelines for calibration. Typically, this involves applying known weights to the machine and adjusting it to match the expected values.

Error Code 404: Communication Failure

Diagnosing Communication Issues: This error relates to problems in data transfer or communication with external devices. Check cables and connections for damage or loose connections.

Communication Troubleshooting: Inspect and replace faulty cables, ensure proper software settings, and consult the manufacturer’s support for further assistance.

Preventive Maintenance

Regular maintenance is key to preventing weighing machine errors. Implement the following practices to keep your equipment in top condition:

  • Regular Calibration: Schedule routine calibrations to ensure accurate measurements.
  • Cleaning and Inspection: Keep the machine and its surroundings clean to prevent dust and debris from affecting performance.

Advanced Error Codes

While the aforementioned error codes are common, there are more complex errors that may require professional intervention.

Error Code 505: Sensor Malfunction

This error suggests a malfunction in the weighing machine’s sensors. Professional repair is necessary to diagnose and rectify this issue.

Error Code 606: Software Bug

Software-related errors may require firmware updates or assistance from the manufacturer’s technical support team.

When to Seek Professional Help

Identifying complex issues beyond basic troubleshooting is essential. Seek professional assistance if you encounter persistent errors or if the machine’s functionality is compromised.

Choosing the Right Service Provider

Select a reputable service provider with experience in repairing weighing machines to ensure the best possible resolution.


Weighing machine error codes may seem daunting at first, but with the right knowledge and troubleshooting skills, you can keep your equipment running smoothly. Regular calibration, maintenance, and a proactive approach to addressing error codes are essential for ensuring the accuracy and reliability of your weighing machines.


  1. What should I do if my weighing machine displays Error Code 101?
    • Recalibrate the machine according to the manufacturer’s instructions to zero it properly.
  2. Can I fix an Error Code 303 on my own?
    • Yes, you can perform calibration following the manufacturer’s guidelines. However, if the issue persists, seek professional assistance.
  3. How often should I calibrate my weighing machine?
    • Calibration frequency depends on usage. Consider calibrating it at least once a month for accurate results.
  4. Is it possible to prevent Error Code 202 from occurring?
    • Yes, by avoiding overloading the machine and staying within its specified weight limits.
  5. Are there any software updates available to fix Error Code 606?
    • Check with the manufacturer for firmware updates or contact their technical support for guidance.

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