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Warn code 401

Updated

Before troubleshooting

For installations involving an inverter and smart meter:

  • Single-phase on-grid inverter.
  • Single-phase smart meter.

Prior to troubleshooting Warn code 401, please verify the following:

  1. Confirm that the wiring between the smart meter and inverter is accurately connected.
  2. Ensure the correct pin configuration on the smart meter.
  3. Check the plug and pins used on the inverter.
  4. Examine the connection integrity between the inverter and smart meter.

Root

When meter communication (Export limit/Power sensor) is enabled, the inverter doesn’t get any data from the meter.

To enable communication between the meter and inverter, follow one of the following options:

  • Activate the communication on the OSS (Turn on the register for meter reading). OR
  • Set up the export limit on the inverter's screen.

Possible reasons of causing the fault

  • Wiring issue: Incorrect wiring between the inverter and meter.
  • Plug issue: Damage to the SYS COM port or connector.
  • Meter issue: The meter is faulty.

Solutions

  1. Disconnect the data plug from the SYS COM port on the inverter, then carefully open the cover of the data plug, ensuring not to damage the cables.
  2. Check to see if the SYS COM port is damaged or broken.
  3. Check if the data plug, identified by the side with pins, is broken or damaged.
  4. Verify the wiring on both the inverter and meter sides. Please send the photos of the connection on both sides. Example as shown below.The example provided pertains to the data plug from the MIN 7-10k TL-X inverter and a three-phase smart meter SDM 630 MODBUS V2. However, the underlying logic remains consistent across different setups.
  5. For MIN2.5-6K TL-X and MIN2.5-6K TL-XH models, ensure that the SYS COM port is being used on the inverter.
  6. Confirm that the data plug and meter are connected via the communication cable, and ensure that the data plug is disconnected from the SYS COM port. Measure the DC voltage between RS485A and RS485B directly from the data plug.
  7. Confirm that the data plug and meter are connected via the communication cable, and ensure that the data plug is disconnected from the SYS COM port. Measure the DC voltage between RS485A and RS485B directly from the meter side.
    1. For MIC, MIN, and MOD series, ensure a constant voltage of 3.3V on both sides. 
    2. For SPH models, ensure a constant voltage of 4.2V on both sides. 
    3. Voltages below 5V are acceptable.
  8. If there is no damage observed on both the SYS COM plug and the data plug, as well as on the communication cable, and the wiring appears to be intact. In such cases, it is recommended to contact Growatt Australia Engineering Team for confirmation of replacing the smart meter.

 

Contact Information:

Growatt New Energy Australia Pty Ltd

Terms and Conditions:

  • Licensed Electrician Requirement:

    • All electrical work, including but not limited to measurements, cable removal, plug handling, installation, and maintenance, must be conducted by a licensed electrician in Australia.

  • Warranty Claim Application:

    • A warranty claim application must be lodged before replacing the unit. The application should include detailed documentation and evidence of the issue (e.g., photos, error logs).

  • Replacement Unit Provision:

    • The replacement unit should be provided by Growatt New Energy Australia Pty Ltd. The replacement process should follow their guidelines and procedures.

  • Confirmation Before Application:

    • Confirmation must be granted by Growatt New Energy Australia Pty Ltd before lodging the warranty claim application. Ensure all steps for diagnosis and troubleshooting are followed as per Growatt's guidelines.

  • Safety Compliance:

    • All work must comply with Australian safety standards and regulations. Proper safety measures must be taken during the diagnosis, repair, and replacement process.

  • Documentation and Evidence:

    • Keep detailed records of all measurements, tests, and actions taken during the troubleshooting process. This includes voltage readings, error codes, firmware versions, and any communications with Growatt's support team.

  • Professional Conduct:

    • The licensed electrician must follow professional conduct standards, ensuring no damage to the system or property. All work must be done with care to avoid voiding the warranty.

  • Post-Replacement Testing:

    • After replacing the inverter, perform comprehensive testing to ensure the new unit is functioning correctly. Document the results and report them to Growatt New Energy Australia Pty Ltd.

  • Customer Communication:

    • Keep the customer informed throughout the process. Provide clear explanations of the issue, the steps being taken, and any necessary actions they need to follow.

  • Follow-up Support:

    • Offer follow-up support to the customer to ensure the problem is fully resolved and the system is operating normally. Provide contact information for any future issues or questions.

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