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Q : Why does the new SPC7K5TR46-S (F) report A-LS immediately upon power-on, and how to troubleshoot it?
A: A-LS failure is usually caused by insufficient DC bus voltage due to low light intensity. Follow the troubleshooting steps below to identify the cause:
Check the parameter settings: Verify that the frequency converter parameters are configured correctly.
Check the DC bus voltage: Measure the DC bus voltage to determine whether it is below the required operating range.
Check the light intensity: Inspect the external weather conditions and confirm whether insufficient sunlight is affecting the system.
If none of the above issues are found, the frequency converter may have hardware damage. Please contact INVT technical support for further assistance.
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