Fault Code (4)4 is displayed when the grid sensor (CT sensor) is incorrectly installed, resulting in a communication issue. This error typically occurs when the sensor is not properly connected to the correct cable or when the sensor terminals are wired incorrectly.
Checks to Perform
- Verify the Grid CT Sensor Installation
- Ensure that the grid CT sensor is securely installed on the correct cable.
- The CT sensor should be installed on the live grid cable (the cable that connects to the grid).
- Confirm Correct Sensor Polarity
- Verify that the CT sensor is connected to the terminals with the correct polarity.
- The markings on the sensor should match the corresponding CT terminals on the device. Incorrect polarity can cause incorrect readings or communication failures.
- Refer to the Installation Manual
- For detailed instructions on proper installation, refer to the Grid CT section in the manual.
- The manual will provide specific guidance on how to securely and correctly install the grid CT sensor, ensuring proper functionality.
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Post-Check Actions
- After making the necessary corrections, restart the system to check if the error is resolved.
- Monitor the device’s performance to ensure that the grid sensor is functioning as expected.
- If the error persists or if you need additional support, consult technical support or refer to the manual for further troubleshooting steps.
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Preventative Recommendations
- Ensure that the grid CT sensor is inspected periodically to ensure it remains securely attached and properly connected.
- If possible, label cables and connections clearly to avoid installation errors.
- You can see additional steps that can be taken in line with grid ct lost on zappi if you click here.
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