What are the potential causes of a specific error code (e.g., C02) in an LG VRF Multi V 5 system?

Error code C02 often indicates a problem with the indoor unit's communication module or a communication issue with the controller. Possible causes include a faulty module, incorrect wiring, or a problem with the controller's firmware. Diagnosis usually involves checking the module's functionality and verifying the connection between the indoor unit and the controller.