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I've noticed that the AC unit is throwing a 2-3 error code when the voltage exceeds 12.1 volts. This situation seems to be affecting its overall performance, and I would like to understand more about the potential causes of this issue. If you could provide me with technical insights or troubleshooting steps, it would be greatly appreciated. Additionally, I'm interested in any recommendations you might have for replacing components or making adjustments to ensure the unit operates smoothly within the specified voltage range. Your expertise in this matter is essential for me to resolve the issue effectively, so any detailed information you can share would be helpful. Thank you!